diff --git a/api/matchingservice/v1/request_response.pb.go b/api/matchingservice/v1/request_response.pb.go
index 924fc90ee2d..3221c319e9b 100644
--- a/api/matchingservice/v1/request_response.pb.go
+++ b/api/matchingservice/v1/request_response.pb.go
@@ -5374,10 +5374,25 @@ func (x *CheckTaskQueueVersionMembershipRequest) GetVersion() *v110.WorkerDeploy
 }
 
 type CheckTaskQueueVersionMembershipResponse struct {
-	state         protoimpl.MessageState `protogen:"open.v1"`
-	IsMember      bool                   `protobuf:"varint,1,opt,name=is_member,json=isMember,proto3" json:"is_member,omitempty"`
-	unknownFields protoimpl.UnknownFields
-	sizeCache     protoimpl.SizeCache
+	state    protoimpl.MessageState `protogen:"open.v1"`
+	IsMember bool                   `protobuf:"varint,1,opt,name=is_member,json=isMember,proto3" json:"is_member,omitempty"`
+	// True when a reactivation signal to this version would be redundant — i.e., matching
+	// determined the version is already in a state where it does not need to be reactivated
+	// (today: CURRENT, RAMPING, or DRAINING). History uses this to suppress such signals.
+	// The zero value (false) is the safe default; it applies when matching has no definitive
+	// answer (version not present in matching's deployment data, or old matching servers
+	// that do not set this field) and tells history to send the signal.
+	ShouldSkipReactivation bool `protobuf:"varint,2,opt,name=should_skip_reactivation,json=shouldSkipReactivation,proto3" json:"should_skip_reactivation,omitempty"`
+	// revision_number is the version's current revision as tracked in matching's per-TQ
+	// deployment data. It is returned so history can compose a stable, cluster-wide-deterministic
+	// RequestId on the reactivation signal. All history pods querying the same version at the
+	// same point in time converge on the same revision_number, so Temporal's built-in
+	// SignalRequestedIds dedup (see signalworkflow/api.go) collapses the N-pod signal fan-out
+	// into exactly one event on the version workflow. Zero when unknown (old matching server or
+	// legacy DeploymentVersionData format that does not carry revision_number).
+	RevisionNumber int64 `protobuf:"varint,3,opt,name=revision_number,json=revisionNumber,proto3" json:"revision_number,omitempty"`
+	unknownFields  protoimpl.UnknownFields
+	sizeCache      protoimpl.SizeCache
 }
 
 func (x *CheckTaskQueueVersionMembershipResponse) Reset() {
@@ -5417,6 +5432,20 @@ func (x *CheckTaskQueueVersionMembershipResponse) GetIsMember() bool {
 	return false
 }
 
+func (x *CheckTaskQueueVersionMembershipResponse) GetShouldSkipReactivation() bool {
+	if x != nil {
+		return x.ShouldSkipReactivation
+	}
+	return false
+}
+
+func (x *CheckTaskQueueVersionMembershipResponse) GetRevisionNumber() int64 {
+	if x != nil {
+		return x.RevisionNumber
+	}
+	return 0
+}
+
 // PollConditions are extra conditions to set on the poll. Only supported with new matcher.
 type PollConditions struct {
 	state protoimpl.MessageState `protogen:"open.v1"`
@@ -6160,9 +6189,11 @@ const file_temporal_server_api_matchingservice_v1_request_response_proto_rawDesc
 	"\n" +
 	"task_queue\x18\x02 \x01(\tR\ttaskQueue\x12L\n" +
 	"\x0ftask_queue_type\x18\x03 \x01(\x0e2$.temporal.api.enums.v1.TaskQueueTypeR\rtaskQueueType\x12T\n" +
-	"\aversion\x18\x04 \x01(\v2:.temporal.server.api.deployment.v1.WorkerDeploymentVersionR\aversion\"F\n" +
+	"\aversion\x18\x04 \x01(\v2:.temporal.server.api.deployment.v1.WorkerDeploymentVersionR\aversion\"\xa9\x01\n" +
 	"'CheckTaskQueueVersionMembershipResponse\x12\x1b\n" +
-	"\tis_member\x18\x01 \x01(\bR\bisMember\"L\n" +
+	"\tis_member\x18\x01 \x01(\bR\bisMember\x128\n" +
+	"\x18should_skip_reactivation\x18\x02 \x01(\bR\x16shouldSkipReactivation\x12'\n" +
+	"\x0frevision_number\x18\x03 \x01(\x03R\x0erevisionNumber\"L\n" +
 	"\x0ePollConditions\x12!\n" +
 	"\fmin_priority\x18\x01 \x01(\x05R\vminPriority\x12\x17\n" +
 	"\ano_wait\x18\x02 \x01(\bR\x06noWaitB>Z<go.temporal.io/server/api/matchingservice/v1;matchingserviceb\x06proto3"
diff --git a/common/dynamicconfig/constants.go b/common/dynamicconfig/constants.go
index 95c6c7c7ac6..54344010dbb 100644
--- a/common/dynamicconfig/constants.go
+++ b/common/dynamicconfig/constants.go
@@ -2921,17 +2921,12 @@ instead of the previous HSM backed implementation.`,
 		`Maximum number of entries in the version membership cache.`,
 	)
 
-	VersionReactivationSignalCacheTTL = NewGlobalDurationSetting(
-		"history.versionReactivationSignalCacheTTL",
-		10*time.Second,
-		`TTL for caching drainage reactivation signals to version workflows. These signals are sent from the history service to update the version workflow's 
-		draining status to DRAINING from DRAINED/INACTIVE states.`,
-	)
-
-	VersionReactivationSignalCacheMaxSize = NewGlobalIntSetting(
-		"history.versionReactivationSignalCacheMaxSize",
+	ReactivationSignalDedupCacheMaxSize = NewGlobalIntSetting(
+		"worker.reactivationSignalDedupCacheMaxSize",
 		10000,
-		`Maximum number of entries in the version reactivation signal cache.`,
+		`Maximum number of entries in the per-pod reactivation-signal dedup cache on the
+		worker deployment client. Each entry tracks the highest revision signaled for one
+		target version workflow.`,
 	)
 
 	EnableVersionReactivationSignals = NewGlobalBoolSetting(
diff --git a/common/metrics/metric_defs.go b/common/metrics/metric_defs.go
index 7c79e16c0c0..930b6bcd52c 100644
--- a/common/metrics/metric_defs.go
+++ b/common/metrics/metric_defs.go
@@ -47,7 +47,7 @@ const (
 	MutableStateCacheTypeTagValue                     = "mutablestate"
 	EventsCacheTypeTagValue                           = "events"
 	VersionMembershipCacheTypeTagValue                = "version_membership"
-	VersionReactivationSignalCacheTypeTagValue        = "version_reactivation_signal"
+	ReactivationSignalDedupCacheTypeTagValue          = "reactivation_signal_dedup"
 	RoutingInfoCacheTypeTagValue                      = "routing_info"
 	NexusEndpointRegistryReadThroughCacheTypeTagValue = "nexus_endpoint_registry_readthrough"
 
@@ -459,8 +459,9 @@ const (
 	VersionMembershipCacheGetScope = "VersionMembershipCacheGet"
 	// VersionMembershipCachePutScope is the scope used by version membership cache
 	VersionMembershipCachePutScope = "VersionMembershipCachePut"
-	// VersionReactivationSignalCacheShouldSendScope is the scope used by version reactivation signal cache
-	VersionReactivationSignalCacheShouldSendScope = "VersionReactivationSignalCacheShouldSend"
+	// ReactivationSignalDedupScope is the scope used by the per-pod reactivation-signal
+	// dedup cache on the worker-deployment client.
+	ReactivationSignalDedupScope = "ReactivationSignalDedup"
 	// RoutingInfoCacheGetScope is the scope used by routing info cache
 	RoutingInfoCacheGetScope = "RoutingInfoCacheGet"
 	// RoutingInfoCachePutScope is the scope used by routing info cache
diff --git a/common/worker_versioning/version_membership_cache.go b/common/worker_versioning/version_membership_cache.go
index d466b06e11e..fe80662f831 100644
--- a/common/worker_versioning/version_membership_cache.go
+++ b/common/worker_versioning/version_membership_cache.go
@@ -7,20 +7,27 @@ import (
 	"go.temporal.io/server/common/metrics"
 )
 
-// VersionMembershipCache is used to cache results of Matching's CheckTaskQueueVersionMembership
-// calls (used internally by the worker versioning pinned override validation).
+// VersionMembershipAndReactivationStatusCache caches results of Matching's
+// CheckTaskQueueVersionMembership calls. It stores three pieces of information per version:
+//   - isMember: whether the task queue exists in the version (used for pinned override validation).
+//   - shouldSkipReactivation: true when the version's current status is CURRENT, RAMPING,
+//     or DRAINING, in which case the caller skips the reactivation signal. The zero value
+//     (false) is the safe default and covers unknown / not-found / old-matching cases.
+//   - revisionNumber: the version's current revision per matching's view. Used as part of the
+//     reactivation signal's RequestId so that all history pods targeting the same version at
+//     the same revision compose the same dedup key. Zero means unknown (old matching server or
+//     legacy DeploymentVersionData format with no revision_number field).
 //
 // Implementations are expected to be safe for concurrent use.
 type (
-	VersionMembershipCache interface {
-		// Get returns (isMember, ok). ok=false means there was no cached value.
+	VersionMembershipAndReactivationStatusCache interface {
 		Get(
 			namespaceID string,
 			taskQueue string,
 			taskQueueType enumspb.TaskQueueType,
 			deploymentName string,
 			buildID string,
-		) (isMember bool, ok bool)
+		) (isMember bool, shouldSkipReactivation bool, revisionNumber int64, ok bool)
 
 		Put(
 			namespaceID string,
@@ -29,6 +36,8 @@ type (
 			deploymentName string,
 			buildID string,
 			isMember bool,
+			shouldSkipReactivation bool,
+			revisionNumber int64,
 		)
 	}
 
@@ -40,28 +49,34 @@ type (
 		buildID        string
 	}
 
-	VersionMembershipCacheImpl struct {
+	versionTaskQueueInfoCacheValue struct {
+		isMember               bool
+		shouldSkipReactivation bool  // false = unknown / not-found / eligible-for-reactivation
+		revisionNumber         int64 // 0 = unknown (old matching server or legacy format)
+	}
+
+	VersionMembershipAndReactivationStatusCacheImpl struct {
 		cache.Cache
 		metricsHandler metrics.Handler
 	}
 )
 
-// NewVersionMembershipCache wraps the provided cache with a typed API and metrics.
-func NewVersionMembershipCache(c cache.Cache, metricsHandler metrics.Handler) VersionMembershipCache {
+// NewVersionMembershipAndReactivationStatusCache wraps the provided cache with a typed API and metrics.
+func NewVersionMembershipAndReactivationStatusCache(c cache.Cache, metricsHandler metrics.Handler) VersionMembershipAndReactivationStatusCache {
 	h := metricsHandler.WithTags(metrics.CacheTypeTag(metrics.VersionMembershipCacheTypeTagValue))
-	return &VersionMembershipCacheImpl{
+	return &VersionMembershipAndReactivationStatusCacheImpl{
 		Cache:          c,
 		metricsHandler: h,
 	}
 }
 
-func (c *VersionMembershipCacheImpl) Get(
+func (c *VersionMembershipAndReactivationStatusCacheImpl) Get(
 	namespaceID string,
 	taskQueue string,
 	taskQueueType enumspb.TaskQueueType,
 	deploymentName string,
 	buildID string,
-) (isMember bool, ok bool) {
+) (isMember bool, shouldSkipReactivation bool, revisionNumber int64, ok bool) {
 	handler := c.metricsHandler.WithTags(metrics.OperationTag(metrics.VersionMembershipCacheGetScope), metrics.NamespaceIDTag(namespaceID))
 	metrics.CacheRequests.With(handler).Record(1)
 
@@ -75,24 +90,26 @@ func (c *VersionMembershipCacheImpl) Get(
 	v := c.Cache.Get(key)
 	if v == nil {
 		metrics.CacheMissCounter.With(handler).Record(1)
-		return false, false
+		return false, false, 0, false
 	}
-	isMember, ok = v.(bool)
+	value, ok := v.(versionTaskQueueInfoCacheValue)
 	if !ok {
 		// Unexpected type: treat as miss to avoid false positives.
 		metrics.CacheMissCounter.With(handler).Record(1)
-		return false, false
+		return false, false, 0, false
 	}
-	return isMember, true
+	return value.isMember, value.shouldSkipReactivation, value.revisionNumber, true
 }
 
-func (c *VersionMembershipCacheImpl) Put(
+func (c *VersionMembershipAndReactivationStatusCacheImpl) Put(
 	namespaceID string,
 	taskQueue string,
 	taskQueueType enumspb.TaskQueueType,
 	deploymentName string,
 	buildID string,
 	isMember bool,
+	shouldSkipReactivation bool,
+	revisionNumber int64,
 ) {
 	handler := c.metricsHandler.WithTags(metrics.OperationTag(metrics.VersionMembershipCachePutScope), metrics.NamespaceIDTag(namespaceID))
 	metrics.CacheRequests.With(handler).Record(1)
@@ -104,5 +121,9 @@ func (c *VersionMembershipCacheImpl) Put(
 		deploymentName: deploymentName,
 		buildID:        buildID,
 	}
-	c.Cache.Put(key, isMember)
+	c.Cache.Put(key, versionTaskQueueInfoCacheValue{
+		isMember:               isMember,
+		shouldSkipReactivation: shouldSkipReactivation,
+		revisionNumber:         revisionNumber,
+	})
 }
diff --git a/common/worker_versioning/version_reactivation_signal_cache.go b/common/worker_versioning/version_reactivation_signal_cache.go
deleted file mode 100644
index ec33c4a1bd8..00000000000
--- a/common/worker_versioning/version_reactivation_signal_cache.go
+++ /dev/null
@@ -1,65 +0,0 @@
-//nolint:staticcheck
-package worker_versioning
-
-import (
-	"go.temporal.io/server/common/cache"
-	"go.temporal.io/server/common/metrics"
-)
-
-// ReactivationSignalCache deduplicates reactivation signals to version workflows.
-//
-// Implementations are expected to be safe for concurrent use.
-type (
-	ReactivationSignalCache interface {
-		// ShouldSendSignal returns true if signal should be sent (not recently sent)
-		// and atomically marks it as sent. Returns false if recently sent.
-		ShouldSendSignal(namespaceID, deploymentName, buildID string) bool
-	}
-
-	reactivationSignalCacheKey struct {
-		namespaceID    string
-		deploymentName string
-		buildID        string
-	}
-
-	ReactivationSignalCacheImpl struct {
-		cache.Cache
-		metricsHandler metrics.Handler
-	}
-)
-
-// NewReactivationSignalCache wraps the provided cache with a typed API and metrics.
-func NewReactivationSignalCache(c cache.Cache, metricsHandler metrics.Handler) ReactivationSignalCache {
-	h := metricsHandler.WithTags(metrics.CacheTypeTag(metrics.VersionReactivationSignalCacheTypeTagValue))
-	return &ReactivationSignalCacheImpl{
-		Cache:          c,
-		metricsHandler: h,
-	}
-}
-
-func (c *ReactivationSignalCacheImpl) ShouldSendSignal(
-	namespaceID, deploymentName, buildID string,
-) bool {
-	handler := c.metricsHandler.WithTags(
-		metrics.OperationTag(metrics.VersionReactivationSignalCacheShouldSendScope),
-		metrics.NamespaceIDTag(namespaceID),
-	)
-	metrics.CacheRequests.With(handler).Record(1)
-
-	key := reactivationSignalCacheKey{
-		namespaceID:    namespaceID,
-		deploymentName: deploymentName,
-		buildID:        buildID,
-	}
-
-	// Check if we recently sent a signal for this version
-	if c.Cache.Get(key) != nil {
-		// Entry exists, signal was recently sent - deduplicate
-		return false
-	}
-
-	// No recent signal, mark as sent and return true
-	metrics.CacheMissCounter.With(handler).Record(1)
-	c.Cache.Put(key, true)
-	return true
-}
diff --git a/common/worker_versioning/worker_versioning.go b/common/worker_versioning/worker_versioning.go
index ec898714834..a0d31082171 100644
--- a/common/worker_versioning/worker_versioning.go
+++ b/common/worker_versioning/worker_versioning.go
@@ -288,13 +288,13 @@ func MakeDirectiveForWorkflowTask(
 
 type IsWFTaskQueueInVersionDetector = func(ctx context.Context, namespaceID, tq string, version *deploymentpb.WorkerDeploymentVersion) (bool, error)
 
-func GetIsWFTaskQueueInVersionDetector(matchingClient resource.MatchingClient, versionMembershipCache VersionMembershipCache) IsWFTaskQueueInVersionDetector {
+func GetIsWFTaskQueueInVersionDetector(matchingClient resource.MatchingClient, versionCache VersionMembershipAndReactivationStatusCache) IsWFTaskQueueInVersionDetector {
 	return func(ctx context.Context,
 		namespaceID, tq string,
 		version *deploymentpb.WorkerDeploymentVersion) (bool, error) {
 
 		// Check cache first.
-		if isMember, ok := versionMembershipCache.Get(
+		if isMember, _, _, ok := versionCache.Get(
 			namespaceID, tq, enumspb.TASK_QUEUE_TYPE_WORKFLOW,
 			version.GetDeploymentName(), version.GetBuildId(),
 		); ok {
@@ -302,31 +302,33 @@ func GetIsWFTaskQueueInVersionDetector(matchingClient resource.MatchingClient, v
 		}
 
 		// Cache miss — resolve via matching RPC.
-		isMember, err := checkTaskQueueVersionMembership(ctx, matchingClient, namespaceID, tq, enumspb.TASK_QUEUE_TYPE_WORKFLOW, version)
+		isMember, shouldSkipReactivation, revisionNumber, err := checkVersionMembershipAndReactivationEligibility(ctx, matchingClient, namespaceID, tq, enumspb.TASK_QUEUE_TYPE_WORKFLOW, version)
 		if err != nil {
 			return false, err
 		}
 
 		// Add result to cache
-		versionMembershipCache.Put(
+		versionCache.Put(
 			namespaceID, tq, enumspb.TASK_QUEUE_TYPE_WORKFLOW,
 			version.GetDeploymentName(), version.GetBuildId(),
-			isMember,
+			isMember, shouldSkipReactivation, revisionNumber,
 		)
 		return isMember, nil
 	}
 }
 
-// checkTaskQueueVersionMembership calls matching to check if a task queue belongs to a version,
-// falling back to fetching the full user data if the CheckTaskQueueVersionMembership RPC is not implemented. (this can happen
-// during rolling upgrades of matching and history services where in history would be on a higher version than matching)
-func checkTaskQueueVersionMembership(
+// checkVersionMembershipAndReactivationEligibility calls matching to check if a task queue belongs to a version
+// and whether the version is currently active-or-draining (see ShouldSkipReactivation for the
+// exact status set). Falls back to fetching the full user data if the CheckTaskQueueVersionMembership
+// RPC is not implemented (this can happen during rolling upgrades where history is on a higher
+// version than matching).
+func checkVersionMembershipAndReactivationEligibility(
 	ctx context.Context,
 	matchingClient resource.MatchingClient,
 	namespaceID, tq string,
 	tqType enumspb.TaskQueueType,
 	version *deploymentpb.WorkerDeploymentVersion,
-) (bool, error) {
+) (isMember bool, shouldSkipReactivation bool, revisionNumber int64, err error) {
 	resp, err := matchingClient.CheckTaskQueueVersionMembership(ctx, &matchingservice.CheckTaskQueueVersionMembershipRequest{
 		NamespaceId:   namespaceID,
 		TaskQueue:     tq,
@@ -340,9 +342,9 @@ func checkTaskQueueVersionMembership(
 		if errors.As(err, &unimplErr) {
 			return checkVersionMembershipViaUserData(ctx, matchingClient, namespaceID, tq, tqType, version)
 		}
-		return false, err
+		return false, false, 0, err
 	}
-	return resp.GetIsMember(), nil
+	return resp.GetIsMember(), resp.GetShouldSkipReactivation(), resp.GetRevisionNumber(), nil
 }
 
 // checkVersionMembershipViaUserData is the fallback for when matching doesn't support
@@ -355,7 +357,7 @@ func checkVersionMembershipViaUserData(
 	tq string,
 	tqType enumspb.TaskQueueType,
 	version *deploymentpb.WorkerDeploymentVersion,
-) (bool, error) {
+) (isMember bool, shouldSkipReactivation bool, revisionNumber int64, err error) {
 	resp, err := matchingClient.GetTaskQueueUserData(ctx,
 		&matchingservice.GetTaskQueueUserDataRequest{
 			NamespaceId:   namespaceID,
@@ -363,13 +365,16 @@ func checkVersionMembershipViaUserData(
 			TaskQueueType: tqType,
 		})
 	if err != nil {
-		return false, err
+		return false, false, 0, err
 	}
 	tqData, ok := resp.GetUserData().GetData().GetPerType()[int32(tqType)]
 	if !ok {
-		return false, nil
+		return false, false, 0, nil
 	}
-	return HasDeploymentVersion(tqData.GetDeploymentData(), DeploymentVersionFromDeployment(DeploymentFromExternalDeploymentVersion(version))), nil
+	deploymentData := tqData.GetDeploymentData()
+	isMember = HasDeploymentVersion(deploymentData, DeploymentVersionFromDeployment(DeploymentFromExternalDeploymentVersion(version)))
+	shouldSkipReactivation, revisionNumber = ShouldSkipReactivation(deploymentData, version.GetDeploymentName(), version.GetBuildId())
+	return isMember, shouldSkipReactivation, revisionNumber, nil
 }
 
 func FindOldDeploymentVersion(deployments *persistencespb.DeploymentData, v *deploymentspb.WorkerDeploymentVersion) int {
@@ -403,6 +408,46 @@ func HasDeploymentVersion(deployments *persistencespb.DeploymentData, v *deploym
 	return false
 }
 
+// ShouldSkipReactivation reports whether a reactivation signal to the given version would
+// be redundant. Returns true when the version's status is CURRENT, RAMPING, or DRAINING.
+// Returns false for DRAINED and INACTIVE (the two statuses the reactivation handler in
+// version_workflow.go acts on) and when the version is not present in the deployment data.
+// (UNSPECIFIED also yields false; in practice the deployment workflow sets a status at
+// construction so this branch should not trigger.)
+//
+// The returned revisionNumber is the version's revision as tracked in the new deployment
+// data format (WorkerDeploymentVersionData.revision_number). It is 0 for the legacy
+// DeploymentVersionData format (which does not carry a revision number) and when the
+// version is not found at all.
+//
+//nolint:staticcheck
+func ShouldSkipReactivation(
+	deployments *persistencespb.DeploymentData,
+	deploymentName string,
+	buildID string,
+) (bool, int64) {
+	// Check old format first (deprecated versions list).
+	for _, vd := range deployments.GetVersions() {
+		if vd.GetVersion().GetDeploymentName() == deploymentName && vd.GetVersion().GetBuildId() == buildID {
+			return isStatusSkippableFromReactivation(vd.GetStatus()), 0
+		}
+	}
+
+	// Check new format (deployments_data map).
+	deploymentData := deployments.GetDeploymentsData()[deploymentName]
+	versionData := deploymentData.GetVersions()[buildID]
+	if versionData == nil || versionData.GetDeleted() {
+		return false, 0
+	}
+	return isStatusSkippableFromReactivation(versionData.GetStatus()), versionData.GetRevisionNumber()
+}
+
+func isStatusSkippableFromReactivation(s enumspb.WorkerDeploymentVersionStatus) bool {
+	return s == enumspb.WORKER_DEPLOYMENT_VERSION_STATUS_CURRENT ||
+		s == enumspb.WORKER_DEPLOYMENT_VERSION_STATUS_RAMPING ||
+		s == enumspb.WORKER_DEPLOYMENT_VERSION_STATUS_DRAINING
+}
+
 func CountDeploymentVersions(deployments *persistencespb.DeploymentData) int {
 	//nolint:staticcheck // SA1019
 	res := len(deployments.GetVersions())
@@ -623,16 +668,16 @@ func ExtractVersioningBehaviorFromOverride(override *workflowpb.VersioningOverri
 	return override.GetBehavior()
 }
 
-func validatePinnedVersionInTaskQueue(ctx context.Context,
+func validateVersionAndGetReactivationEligibility(ctx context.Context,
 	pinnedVersion *deploymentpb.WorkerDeploymentVersion,
 	matchingClient resource.MatchingClient,
-	versionMembershipCache VersionMembershipCache,
+	versionCache VersionMembershipAndReactivationStatusCache,
 	tq string,
 	tqType enumspb.TaskQueueType,
-	namespaceID string) error {
+	namespaceID string) (shouldSkipReactivation bool, revisionNumber int64, err error) {
 
 	// Check if we have recently queried matching to validate if this version exists in the task queue.
-	if isMember, ok := versionMembershipCache.Get(
+	if isMember, cachedActiveOrDraining, cachedRevision, ok := versionCache.Get(
 		namespaceID,
 		tq,
 		tqType,
@@ -640,88 +685,90 @@ func validatePinnedVersionInTaskQueue(ctx context.Context,
 		pinnedVersion.BuildId,
 	); ok {
 		if isMember {
-			return nil
+			return cachedActiveOrDraining, cachedRevision, nil
 		}
-		return serviceerror.NewFailedPrecondition(
+		return false, 0, serviceerror.NewFailedPrecondition(
 			FormatPinnedVersionNotInTaskQueueError(pinnedVersion.GetDeploymentName(), pinnedVersion.GetBuildId(), tq, tqType),
 		)
 	}
 
-	isMember, err := checkTaskQueueVersionMembership(ctx, matchingClient, namespaceID, tq, tqType, pinnedVersion)
+	isMember, shouldSkipReactivation, revisionNumber, err := checkVersionMembershipAndReactivationEligibility(ctx, matchingClient, namespaceID, tq, tqType, pinnedVersion)
 	if err != nil {
-		return err
+		return false, 0, err
 	}
 
 	// Add result to cache
-	versionMembershipCache.Put(
+	versionCache.Put(
 		namespaceID,
 		tq,
 		tqType,
 		pinnedVersion.DeploymentName,
 		pinnedVersion.BuildId,
 		isMember,
+		shouldSkipReactivation,
+		revisionNumber,
 	)
 	if !isMember {
-		return serviceerror.NewFailedPrecondition(
+		return false, 0, serviceerror.NewFailedPrecondition(
 			FormatPinnedVersionNotInTaskQueueError(pinnedVersion.GetDeploymentName(), pinnedVersion.GetBuildId(), tq, tqType),
 		)
 	}
-	return nil
+	return shouldSkipReactivation, revisionNumber, nil
 }
 
-func ValidateVersioningOverride(ctx context.Context,
+func ValidateVersioningOverrideAndGetReactivationEligibility(ctx context.Context,
 	override *workflowpb.VersioningOverride,
 	matchingClient resource.MatchingClient,
-	versionMembershipCache VersionMembershipCache,
+	versionCache VersionMembershipAndReactivationStatusCache,
 	tq string,
 	tqType enumspb.TaskQueueType,
-	namespaceID string) error {
+	namespaceID string) (shouldSkipReactivation bool, revisionNumber int64, err error) {
 	if override == nil {
-		return nil
+		return false, 0, nil
 	}
 
 	if override.GetAutoUpgrade() { // v0.32
-		return nil
+		return false, 0, nil
 	} else if p := override.GetPinned(); p != nil {
 		if p.GetVersion() == nil {
-			return serviceerror.NewInvalidArgument("must provide version if override is pinned.")
+			return false, 0, serviceerror.NewInvalidArgument("must provide version if override is pinned.")
 		}
 		if p.GetBehavior() == workflowpb.VersioningOverride_PINNED_OVERRIDE_BEHAVIOR_UNSPECIFIED {
-			return serviceerror.NewInvalidArgument("must specify pinned override behavior if override is pinned.")
+			return false, 0, serviceerror.NewInvalidArgument("must specify pinned override behavior if override is pinned.")
 		}
-		return validatePinnedVersionInTaskQueue(ctx, p.GetVersion(), matchingClient, versionMembershipCache, tq, tqType, namespaceID)
+		return validateVersionAndGetReactivationEligibility(ctx, p.GetVersion(), matchingClient, versionCache, tq, tqType, namespaceID)
 	}
 
 	//nolint:staticcheck // SA1019: worker versioning v0.31
 	switch override.GetBehavior() {
 	case enumspb.VERSIONING_BEHAVIOR_PINNED:
 		if override.GetDeployment() != nil {
-			return ValidateDeployment(override.GetDeployment())
+			return false, 0, ValidateDeployment(override.GetDeployment())
 		} else if override.GetPinnedVersion() != "" {
 			_, err := ValidateDeploymentVersionStringV31(override.GetPinnedVersion())
 			if err != nil {
-				return err
+				return false, 0, err
 			}
 
-			return validatePinnedVersionInTaskQueue(ctx, ExternalWorkerDeploymentVersionFromStringV31(override.GetPinnedVersion()), matchingClient, versionMembershipCache, tq, tqType, namespaceID)
+			return validateVersionAndGetReactivationEligibility(ctx, ExternalWorkerDeploymentVersionFromStringV31(override.GetPinnedVersion()), matchingClient, versionCache, tq, tqType, namespaceID)
 
 		} else {
-			return serviceerror.NewInvalidArgument("must provide deployment (deprecated) or pinned version if behavior is 'PINNED'")
+			return false, 0, serviceerror.NewInvalidArgument("must provide deployment (deprecated) or pinned version if behavior is 'PINNED'")
 		}
 	case enumspb.VERSIONING_BEHAVIOR_AUTO_UPGRADE:
 		if override.GetDeployment() != nil {
-			return serviceerror.NewInvalidArgument("only provide deployment if behavior is 'PINNED'")
+			return false, 0, serviceerror.NewInvalidArgument("only provide deployment if behavior is 'PINNED'")
 		}
 		if override.GetPinnedVersion() != "" {
-			return serviceerror.NewInvalidArgument("only provide pinned version if behavior is 'PINNED'")
+			return false, 0, serviceerror.NewInvalidArgument("only provide pinned version if behavior is 'PINNED'")
 		}
 	case enumspb.VERSIONING_BEHAVIOR_UNSPECIFIED:
-		return serviceerror.NewInvalidArgument("override behavior is required")
+		return false, 0, serviceerror.NewInvalidArgument("override behavior is required")
 	default:
 		//nolint:staticcheck // SA1019 deprecated stamp will clean up later
-		return serviceerror.NewInvalidArgumentf("override behavior %s not recognized", override.GetBehavior())
+		return false, 0, serviceerror.NewInvalidArgumentf("override behavior %s not recognized", override.GetBehavior())
 	}
-	return nil
+	return false, 0, nil
 }
 
 // FindTargetDeploymentVersionAndRevisionNumberForWorkflowID returns the deployment version and revision number (if applicable) for
diff --git a/common/worker_versioning/worker_versioning_test.go b/common/worker_versioning/worker_versioning_test.go
index 032e9ae8cd0..2a42176a724 100644
--- a/common/worker_versioning/worker_versioning_test.go
+++ b/common/worker_versioning/worker_versioning_test.go
@@ -42,16 +42,16 @@ var (
 
 type testVersionMembershipCache struct {
 	mu       sync.Mutex
-	m        map[versionMembershipCacheKey]bool
+	m        map[versionMembershipCacheKey]versionTaskQueueInfoCacheValue
 	getCalls int
 	putCalls int
 }
 
 func newTestVersionMembershipCache() *testVersionMembershipCache {
-	return &testVersionMembershipCache{m: make(map[versionMembershipCacheKey]bool)}
+	return &testVersionMembershipCache{m: make(map[versionMembershipCacheKey]versionTaskQueueInfoCacheValue)}
 }
 
-var _ VersionMembershipCache = (*testVersionMembershipCache)(nil)
+var _ VersionMembershipAndReactivationStatusCache = (*testVersionMembershipCache)(nil)
 
 func (c *testVersionMembershipCache) Get(
 	namespaceID string,
@@ -59,7 +59,7 @@ func (c *testVersionMembershipCache) Get(
 	taskQueueType enumspb.TaskQueueType,
 	deploymentName string,
 	buildID string,
-) (isMember bool, ok bool) {
+) (isMember bool, shouldSkipReactivation bool, revisionNumber int64, ok bool) {
 	c.mu.Lock()
 	defer c.mu.Unlock()
 	c.getCalls++
@@ -70,7 +70,7 @@ func (c *testVersionMembershipCache) Get(
 		deploymentName: deploymentName,
 		buildID:        buildID,
 	}]
-	return v, ok
+	return v.isMember, v.shouldSkipReactivation, v.revisionNumber, ok
 }
 
 func (c *testVersionMembershipCache) Put(
@@ -80,6 +80,8 @@ func (c *testVersionMembershipCache) Put(
 	deploymentName string,
 	buildID string,
 	isMember bool,
+	shouldSkipReactivation bool,
+	revisionNumber int64,
 ) {
 	c.mu.Lock()
 	defer c.mu.Unlock()
@@ -90,7 +92,159 @@ func (c *testVersionMembershipCache) Put(
 		taskQueueType:  taskQueueType,
 		deploymentName: deploymentName,
 		buildID:        buildID,
-	}] = isMember
+	}] = versionTaskQueueInfoCacheValue{isMember: isMember, shouldSkipReactivation: shouldSkipReactivation, revisionNumber: revisionNumber}
+}
+
+func TestShouldSkipReactivation(t *testing.T) {
+	tests := []struct {
+		name                   string
+		deployments            *persistencespb.DeploymentData
+		deploymentName         string
+		buildID                string
+		expected               bool
+		expectedRevisionNumber int64
+	}{
+		{
+			name:                   "nil deployments returns false (not found → caller should send signal)",
+			deployments:            nil,
+			deploymentName:         "dep",
+			buildID:                "build",
+			expected:               false,
+			expectedRevisionNumber: 0,
+		},
+		{
+			name: "version not found returns false",
+			deployments: &persistencespb.DeploymentData{
+				DeploymentsData: map[string]*persistencespb.WorkerDeploymentData{},
+			},
+			deploymentName:         "dep",
+			buildID:                "build",
+			expected:               false,
+			expectedRevisionNumber: 0,
+		},
+		{
+			name: "new format: DRAINED returns false (caller should send signal) with revision_number",
+			deployments: &persistencespb.DeploymentData{
+				DeploymentsData: map[string]*persistencespb.WorkerDeploymentData{
+					"dep": {Versions: map[string]*deploymentspb.WorkerDeploymentVersionData{
+						"build": {Status: enumspb.WORKER_DEPLOYMENT_VERSION_STATUS_DRAINED, RevisionNumber: 42},
+					}},
+				},
+			},
+			deploymentName:         "dep",
+			buildID:                "build",
+			expected:               false,
+			expectedRevisionNumber: 42,
+		},
+		{
+			name: "new format: INACTIVE returns false with revision_number",
+			deployments: &persistencespb.DeploymentData{
+				DeploymentsData: map[string]*persistencespb.WorkerDeploymentData{
+					"dep": {Versions: map[string]*deploymentspb.WorkerDeploymentVersionData{
+						"build": {Status: enumspb.WORKER_DEPLOYMENT_VERSION_STATUS_INACTIVE, RevisionNumber: 7},
+					}},
+				},
+			},
+			deploymentName:         "dep",
+			buildID:                "build",
+			expected:               false,
+			expectedRevisionNumber: 7,
+		},
+		{
+			name: "new format: CURRENT returns true with revision_number",
+			deployments: &persistencespb.DeploymentData{
+				DeploymentsData: map[string]*persistencespb.WorkerDeploymentData{
+					"dep": {Versions: map[string]*deploymentspb.WorkerDeploymentVersionData{
+						"build": {Status: enumspb.WORKER_DEPLOYMENT_VERSION_STATUS_CURRENT, RevisionNumber: 3},
+					}},
+				},
+			},
+			deploymentName:         "dep",
+			buildID:                "build",
+			expected:               true,
+			expectedRevisionNumber: 3,
+		},
+		{
+			name: "new format: RAMPING returns true",
+			deployments: &persistencespb.DeploymentData{
+				DeploymentsData: map[string]*persistencespb.WorkerDeploymentData{
+					"dep": {Versions: map[string]*deploymentspb.WorkerDeploymentVersionData{
+						"build": {Status: enumspb.WORKER_DEPLOYMENT_VERSION_STATUS_RAMPING},
+					}},
+				},
+			},
+			deploymentName:         "dep",
+			buildID:                "build",
+			expected:               true,
+			expectedRevisionNumber: 0,
+		},
+		{
+			name: "new format: DRAINING returns true",
+			deployments: &persistencespb.DeploymentData{
+				DeploymentsData: map[string]*persistencespb.WorkerDeploymentData{
+					"dep": {Versions: map[string]*deploymentspb.WorkerDeploymentVersionData{
+						"build": {Status: enumspb.WORKER_DEPLOYMENT_VERSION_STATUS_DRAINING, RevisionNumber: 11},
+					}},
+				},
+			},
+			deploymentName:         "dep",
+			buildID:                "build",
+			expected:               true,
+			expectedRevisionNumber: 11,
+		},
+		{
+			name: "new format: deleted version returns false (treated as not-found)",
+			deployments: &persistencespb.DeploymentData{
+				DeploymentsData: map[string]*persistencespb.WorkerDeploymentData{
+					"dep": {Versions: map[string]*deploymentspb.WorkerDeploymentVersionData{
+						"build": {Status: enumspb.WORKER_DEPLOYMENT_VERSION_STATUS_DRAINED, Deleted: true, RevisionNumber: 99},
+					}},
+				},
+			},
+			deploymentName:         "dep",
+			buildID:                "build",
+			expected:               false,
+			expectedRevisionNumber: 0,
+		},
+		{
+			name: "old format: DRAINED returns false with revision_number 0 (no field in old format)",
+			deployments: &persistencespb.DeploymentData{
+				Versions: []*deploymentspb.DeploymentVersionData{
+					{
+						Version: &deploymentspb.WorkerDeploymentVersion{DeploymentName: "dep", BuildId: "build"},
+						Status:  enumspb.WORKER_DEPLOYMENT_VERSION_STATUS_DRAINED,
+					},
+				},
+			},
+			deploymentName:         "dep",
+			buildID:                "build",
+			expected:               false,
+			expectedRevisionNumber: 0,
+		},
+		{
+			name: "old format: CURRENT returns true with revision_number 0",
+			deployments: &persistencespb.DeploymentData{
+				Versions: []*deploymentspb.DeploymentVersionData{
+					{
+						Version: &deploymentspb.WorkerDeploymentVersion{DeploymentName: "dep", BuildId: "build"},
+						Status:  enumspb.WORKER_DEPLOYMENT_VERSION_STATUS_CURRENT,
+					},
+				},
+			},
+			deploymentName:         "dep",
+			buildID:                "build",
+			expected:               true,
+			expectedRevisionNumber: 0,
+		},
+	}
+
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			result, revisionNumber := ShouldSkipReactivation(tt.deployments, tt.deploymentName, tt.buildID)
+			require.Equal(t, tt.expected, result)
+			require.Equal(t, tt.expectedRevisionNumber, revisionNumber)
+		})
+	}
 }
 
 func TestCalculateTaskQueueVersioningInfo(t *testing.T) {
@@ -815,7 +969,7 @@ func TestWorkerDeploymentVersionFromStringV32(t *testing.T) {
 	}
 }
 
-func TestValidateVersioningOverride(t *testing.T) {
+func TestValidateVersioningOverrideAndGetReactivationEligibility(t *testing.T) {
 	testNamespaceID := "test-namespace-id"
 	testTaskQueue := "test-task-queue"
 	testVersion := &deploymentpb.WorkerDeploymentVersion{
@@ -829,13 +983,15 @@ func TestValidateVersioningOverride(t *testing.T) {
 	}
 
 	tests := []struct {
-		name          string
-		override      *workflowpb.VersioningOverride
-		taskQueueType enumspb.TaskQueueType
-		setupCache    func(c *testVersionMembershipCache)
-		setupMock     func(m *matchingservicemock.MockMatchingServiceClient)
-		expectError   bool
-		errorContains string
+		name                           string
+		override                       *workflowpb.VersioningOverride
+		taskQueueType                  enumspb.TaskQueueType
+		setupCache                     func(c *testVersionMembershipCache)
+		setupMock                      func(m *matchingservicemock.MockMatchingServiceClient)
+		expectError                    bool
+		errorContains                  string
+		expectedShouldSkipReactivation bool
+		expectedRevisionNumber         int64
 	}{
 		{
 			name:        "nil override returns nil",
@@ -856,7 +1012,7 @@ func TestValidateVersioningOverride(t *testing.T) {
 			expectError: false,
 		},
 		{
-			name: "v0.32: Pinned override, with cache hit, returns nil",
+			name: "v0.32: Pinned override, with cache hit (drained), returns isDrainedOrInactive=true and cached revision",
 			override: &workflowpb.VersioningOverride{
 				Override: &workflowpb.VersioningOverride_Pinned{
 					Pinned: &workflowpb.VersioningOverride_PinnedOverride{
@@ -866,12 +1022,36 @@ func TestValidateVersioningOverride(t *testing.T) {
 				},
 			},
 			setupCache: func(c *testVersionMembershipCache) {
-				c.Put(testNamespaceID, testTaskQueue, enumspb.TASK_QUEUE_TYPE_WORKFLOW, testVersion.DeploymentName, testVersion.BuildId, true)
+				// Cache says the version is drained/inactive (shouldSkipReactivation=false)
+				// with revision 42.
+				c.Put(testNamespaceID, testTaskQueue, enumspb.TASK_QUEUE_TYPE_WORKFLOW, testVersion.DeploymentName, testVersion.BuildId, true, false, 42)
 			},
 			setupMock: func(m *matchingservicemock.MockMatchingServiceClient) {
 				m.EXPECT().CheckTaskQueueVersionMembership(gomock.Any(), gomock.Any()).Times(0) // No RPC call expected!
 			},
-			expectError: false,
+			expectError:                    false,
+			expectedShouldSkipReactivation: false,
+			expectedRevisionNumber:         42,
+		},
+		{
+			name: "v0.32: Pinned override, with cache hit (active), returns isDrainedOrInactive=false",
+			override: &workflowpb.VersioningOverride{
+				Override: &workflowpb.VersioningOverride_Pinned{
+					Pinned: &workflowpb.VersioningOverride_PinnedOverride{
+						Behavior: workflowpb.VersioningOverride_PINNED_OVERRIDE_BEHAVIOR_PINNED,
+						Version:  testVersion,
+					},
+				},
+			},
+			setupCache: func(c *testVersionMembershipCache) {
+				// Cache says the version is active (shouldSkipReactivation=true).
+				c.Put(testNamespaceID, testTaskQueue, enumspb.TASK_QUEUE_TYPE_WORKFLOW, testVersion.DeploymentName, testVersion.BuildId, true, true, 0)
+			},
+			setupMock: func(m *matchingservicemock.MockMatchingServiceClient) {
+				m.EXPECT().CheckTaskQueueVersionMembership(gomock.Any(), gomock.Any()).Times(0) // No RPC call expected!
+			},
+			expectError:                    false,
+			expectedShouldSkipReactivation: true,
 		},
 		{
 			name: "v0.32: Pinned override, with cache hit, returns error (since version is not present in the task queue)",
@@ -884,7 +1064,7 @@ func TestValidateVersioningOverride(t *testing.T) {
 				},
 			},
 			setupCache: func(c *testVersionMembershipCache) {
-				c.Put(testNamespaceID, testTaskQueue, enumspb.TASK_QUEUE_TYPE_WORKFLOW, testVersion.DeploymentName, testVersion.BuildId, false)
+				c.Put(testNamespaceID, testTaskQueue, enumspb.TASK_QUEUE_TYPE_WORKFLOW, testVersion.DeploymentName, testVersion.BuildId, false, false, 0)
 			},
 			setupMock: func(m *matchingservicemock.MockMatchingServiceClient) {
 				m.EXPECT().CheckTaskQueueVersionMembership(gomock.Any(), gomock.Any()).Times(0) // No RPC call expected!
@@ -904,7 +1084,7 @@ func TestValidateVersioningOverride(t *testing.T) {
 				},
 			},
 			setupCache: func(c *testVersionMembershipCache) {
-				c.Put(testNamespaceID, testTaskQueue, enumspb.TASK_QUEUE_TYPE_WORKFLOW, testVersion.DeploymentName, testVersion.BuildId, true)
+				c.Put(testNamespaceID, testTaskQueue, enumspb.TASK_QUEUE_TYPE_WORKFLOW, testVersion.DeploymentName, testVersion.BuildId, true, false, 0)
 			},
 			setupMock: func(m *matchingservicemock.MockMatchingServiceClient) {
 				m.EXPECT().CheckTaskQueueVersionMembership(
@@ -939,7 +1119,55 @@ func TestValidateVersioningOverride(t *testing.T) {
 			errorContains: getPinnedVersionErrorMsg(testVersion, testTaskQueue, enumspb.TASK_QUEUE_TYPE_WORKFLOW),
 		},
 		{
-			name: "v0.32: Pinned override, with cache miss, calls RPC and caches true",
+			name: "v0.32: Pinned override, with cache miss, RPC returns member and drained with revision",
+			override: &workflowpb.VersioningOverride{
+				Override: &workflowpb.VersioningOverride_Pinned{
+					Pinned: &workflowpb.VersioningOverride_PinnedOverride{
+						Behavior: workflowpb.VersioningOverride_PINNED_OVERRIDE_BEHAVIOR_PINNED,
+						Version:  testVersion,
+					},
+				},
+			},
+			setupCache: func(c *testVersionMembershipCache) {},
+			setupMock: func(m *matchingservicemock.MockMatchingServiceClient) {
+				m.EXPECT().CheckTaskQueueVersionMembership(
+					gomock.Any(),
+					gomock.Any(),
+				).Return(&matchingservice.CheckTaskQueueVersionMembershipResponse{
+					IsMember:               true,
+					ShouldSkipReactivation: false, // drained/inactive on matching's side
+					RevisionNumber:         7,
+				}, nil)
+			},
+			expectError:                    false,
+			expectedShouldSkipReactivation: false,
+			expectedRevisionNumber:         7,
+		},
+		{
+			name: "v0.32: Pinned override, with cache miss, RPC returns member and active",
+			override: &workflowpb.VersioningOverride{
+				Override: &workflowpb.VersioningOverride_Pinned{
+					Pinned: &workflowpb.VersioningOverride_PinnedOverride{
+						Behavior: workflowpb.VersioningOverride_PINNED_OVERRIDE_BEHAVIOR_PINNED,
+						Version:  testVersion,
+					},
+				},
+			},
+			setupCache: func(c *testVersionMembershipCache) {},
+			setupMock: func(m *matchingservicemock.MockMatchingServiceClient) {
+				m.EXPECT().CheckTaskQueueVersionMembership(
+					gomock.Any(),
+					gomock.Any(),
+				).Return(&matchingservice.CheckTaskQueueVersionMembershipResponse{
+					IsMember:               true,
+					ShouldSkipReactivation: true, // active on matching's side
+				}, nil)
+			},
+			expectError:                    false,
+			expectedShouldSkipReactivation: true,
+		},
+		{
+			name: "v0.32: Pinned override, with cache miss, RPC returns member without eligibility (old matching)",
 			override: &workflowpb.VersioningOverride{
 				Override: &workflowpb.VersioningOverride_Pinned{
 					Pinned: &workflowpb.VersioningOverride_PinnedOverride{
@@ -957,7 +1185,8 @@ func TestValidateVersioningOverride(t *testing.T) {
 					IsMember: true,
 				}, nil)
 			},
-			expectError: false,
+			expectError:                    false,
+			expectedShouldSkipReactivation: false, // old matching server — zero-value treated as "don't know, send signal"
 		},
 		{
 			name: "v0.32: Pinned override, without version, returns error",
@@ -1030,7 +1259,7 @@ func TestValidateVersioningOverride(t *testing.T) {
 				PinnedVersion: "test-deployment.test-build-id",
 			},
 			setupCache: func(c *testVersionMembershipCache) {
-				c.Put(testNamespaceID, testTaskQueue, enumspb.TASK_QUEUE_TYPE_WORKFLOW, "test-deployment", "test-build-id", true)
+				c.Put(testNamespaceID, testTaskQueue, enumspb.TASK_QUEUE_TYPE_WORKFLOW, "test-deployment", "test-build-id", true, false, 0)
 			},
 			setupMock: func(m *matchingservicemock.MockMatchingServiceClient) {
 				m.EXPECT().CheckTaskQueueVersionMembership(gomock.Any(), gomock.Any()).Times(0)
@@ -1044,7 +1273,7 @@ func TestValidateVersioningOverride(t *testing.T) {
 				PinnedVersion: "test-deployment.test-build-id",
 			},
 			setupCache: func(c *testVersionMembershipCache) {
-				c.Put(testNamespaceID, testTaskQueue, enumspb.TASK_QUEUE_TYPE_WORKFLOW, "test-deployment", "test-build-id", false)
+				c.Put(testNamespaceID, testTaskQueue, enumspb.TASK_QUEUE_TYPE_WORKFLOW, "test-deployment", "test-build-id", false, false, 0)
 			},
 			setupMock: func(m *matchingservicemock.MockMatchingServiceClient) {
 				m.EXPECT().CheckTaskQueueVersionMembership(gomock.Any(), gomock.Any()).Times(0)
@@ -1154,7 +1383,8 @@ func TestValidateVersioningOverride(t *testing.T) {
 						},
 					}, nil)
 			},
-			expectError: false,
+			expectError:                    false,
+			expectedShouldSkipReactivation: false, // version data exists with UNSPECIFIED status — not in {CURRENT, RAMPING, DRAINING}
 		},
 		{
 			name: "v0.32: Pinned override, Unimplemented fallback, version is not member",
@@ -1203,7 +1433,7 @@ func TestValidateVersioningOverride(t *testing.T) {
 			if tqType == enumspb.TASK_QUEUE_TYPE_UNSPECIFIED {
 				tqType = enumspb.TASK_QUEUE_TYPE_WORKFLOW
 			}
-			err := ValidateVersioningOverride(
+			shouldSkipReactivation, revisionNumber, err := ValidateVersioningOverrideAndGetReactivationEligibility(
 				context.Background(),
 				tt.override,
 				mockMatchingClient,
@@ -1220,6 +1450,8 @@ func TestValidateVersioningOverride(t *testing.T) {
 				}
 			} else {
 				require.NoError(t, err)
+				require.Equal(t, tt.expectedShouldSkipReactivation, shouldSkipReactivation)
+				require.Equal(t, tt.expectedRevisionNumber, revisionNumber)
 			}
 		})
 	}
@@ -1369,7 +1601,7 @@ func TestGetIsWFTaskQueueInVersionDetector(t *testing.T) {
 			taskQueueType:  enumspb.TASK_QUEUE_TYPE_WORKFLOW,
 			deploymentName: testVersion.DeploymentName,
 			buildID:        testVersion.BuildId,
-		}] = true
+		}] = versionTaskQueueInfoCacheValue{isMember: true}
 
 		function := GetIsWFTaskQueueInVersionDetector(mockClient, cache)
 		isMember, err := function(context.Background(), testNamespaceID, testTaskQueue, testVersion)
@@ -1391,7 +1623,7 @@ func TestGetIsWFTaskQueueInVersionDetector(t *testing.T) {
 			taskQueueType:  enumspb.TASK_QUEUE_TYPE_WORKFLOW,
 			deploymentName: testVersion.DeploymentName,
 			buildID:        testVersion.BuildId,
-		}] = false
+		}] = versionTaskQueueInfoCacheValue{isMember: false}
 
 		function := GetIsWFTaskQueueInVersionDetector(mockClient, cache)
 		isMember, err := function(context.Background(), testNamespaceID, testTaskQueue, testVersion)
@@ -1415,7 +1647,7 @@ func TestGetIsWFTaskQueueInVersionDetector(t *testing.T) {
 		assert.Equal(t, 1, cache.putCalls)
 
 		// Verify the value was actually stored.
-		cached, ok := cache.Get(testNamespaceID, testTaskQueue, enumspb.TASK_QUEUE_TYPE_WORKFLOW, testVersion.DeploymentName, testVersion.BuildId)
+		cached, _, _, ok := cache.Get(testNamespaceID, testTaskQueue, enumspb.TASK_QUEUE_TYPE_WORKFLOW, testVersion.DeploymentName, testVersion.BuildId)
 		assert.True(t, ok)
 		assert.True(t, cached)
 	})
diff --git a/proto/internal/temporal/server/api/matchingservice/v1/request_response.proto b/proto/internal/temporal/server/api/matchingservice/v1/request_response.proto
index 28bf1593a73..aab9bcb12f4 100644
--- a/proto/internal/temporal/server/api/matchingservice/v1/request_response.proto
+++ b/proto/internal/temporal/server/api/matchingservice/v1/request_response.proto
@@ -738,6 +738,21 @@ message CheckTaskQueueVersionMembershipRequest {
 
 message CheckTaskQueueVersionMembershipResponse {
   bool is_member = 1;
+  // True when a reactivation signal to this version would be redundant — i.e., matching
+  // determined the version is already in a state where it does not need to be reactivated
+  // (today: CURRENT, RAMPING, or DRAINING). History uses this to suppress such signals.
+  // The zero value (false) is the safe default; it applies when matching has no definitive
+  // answer (version not present in matching's deployment data, or old matching servers
+  // that do not set this field) and tells history to send the signal.
+  bool should_skip_reactivation = 2;
+  // revision_number is the version's current revision as tracked in matching's per-TQ
+  // deployment data. It is returned so history can compose a stable, cluster-wide-deterministic
+  // RequestId on the reactivation signal. All history pods querying the same version at the
+  // same point in time converge on the same revision_number, so Temporal's built-in
+  // SignalRequestedIds dedup (see signalworkflow/api.go) collapses the N-pod signal fan-out
+  // into exactly one event on the version workflow. Zero when unknown (old matching server or
+  // legacy DeploymentVersionData format that does not carry revision_number).
+  int64 revision_number = 3;
 }
 
 // PollConditions are extra conditions to set on the poll. Only supported with new matcher.
diff --git a/service/history/api/multioperation/api.go b/service/history/api/multioperation/api.go
index 8941b040dcb..332945845a1 100644
--- a/service/history/api/multioperation/api.go
+++ b/service/history/api/multioperation/api.go
@@ -60,8 +60,7 @@ func Invoke(
 	workflowConsistencyChecker api.WorkflowConsistencyChecker,
 	tokenSerializer *tasktoken.Serializer,
 	matchingClient matchingservice.MatchingServiceClient,
-	versionMembershipCache worker_versioning.VersionMembershipCache,
-	reactivationSignalCache worker_versioning.ReactivationSignalCache,
+	versionCache worker_versioning.VersionMembershipAndReactivationStatusCache,
 	reactivationSignaler api.VersionReactivationSignalerFn,
 	testHooks testhooks.TestHooks,
 ) (*historyservice.ExecuteMultiOperationResponse, error) {
@@ -102,8 +101,7 @@ func Invoke(
 			tokenSerializer,
 			startReq,
 			matchingClient,
-			versionMembershipCache,
-			reactivationSignalCache,
+			versionCache,
 			reactivationSignaler,
 			uws.workflowLeaseCallback(ctx),
 		)
diff --git a/service/history/api/resetworkflow/api.go b/service/history/api/resetworkflow/api.go
index 659216f623e..d5187d3890f 100644
--- a/service/history/api/resetworkflow/api.go
+++ b/service/history/api/resetworkflow/api.go
@@ -30,8 +30,7 @@ func Invoke(
 	shardContext historyi.ShardContext,
 	workflowConsistencyChecker api.WorkflowConsistencyChecker,
 	matchingClient matchingservice.MatchingServiceClient,
-	versionMembershipCache worker_versioning.VersionMembershipCache,
-	reactivationSignalCache worker_versioning.ReactivationSignalCache,
+	versionCache worker_versioning.VersionMembershipAndReactivationStatusCache,
 	reactivationSignaler api.VersionReactivationSignalerFn,
 ) (_ *historyservice.ResetWorkflowExecutionResponse, retError error) {
 	namespaceID := namespace.ID(resetRequest.GetNamespaceId())
@@ -77,7 +76,7 @@ func Invoke(
 	}
 
 	// Validate versioning override, if any.
-	err = validatePostResetOperationInputs(ctx, request.GetPostResetOperations(), matchingClient, versionMembershipCache,
+	shouldSkipReactivationPerOp, revisionNumberPerOp, err := validatePostResetOperationInputs(ctx, request.GetPostResetOperations(), matchingClient, versionCache,
 		baseMutableState.GetExecutionInfo().GetTaskQueue(), namespaceID.String())
 	if err != nil {
 		return nil, err
@@ -193,10 +192,10 @@ func Invoke(
 	}
 
 	// Notify version workflow if we're pinning to a potentially drained version via post-reset operations
-	for _, operation := range request.GetPostResetOperations() {
+	for i, operation := range request.GetPostResetOperations() {
 		if updateOpts, ok := operation.GetVariant().(*workflowpb.PostResetOperation_UpdateWorkflowOptions_); ok {
 			api.ReactivateVersionWorkflowIfPinned(ctx, namespaceEntry,
-				updateOpts.UpdateWorkflowOptions.GetWorkflowExecutionOptions().GetVersioningOverride(), reactivationSignalCache, reactivationSignaler, shardContext.GetConfig().EnableVersionReactivationSignals())
+				updateOpts.UpdateWorkflowOptions.GetWorkflowExecutionOptions().GetVersioningOverride(), reactivationSignaler, shardContext.GetConfig().EnableVersionReactivationSignals(), shouldSkipReactivationPerOp[i], revisionNumberPerOp[i])
 		}
 	}
 
@@ -234,22 +233,37 @@ func GetResetReapplyExcludeTypes(
 }
 
 // validatePostResetOperationInputs validates the optional post reset operation inputs.
+// Returns parallel slices (one entry per operation) carrying the reactivation-signal inputs
+// derived from the operation's versioning override:
+//   - shouldSkipReactivationPerOp: whether each operation's pinned version is active or
+//     still draining per matching (true → no need to send a reactivation signal; false
+//     covers drained/inactive, unknown, not-found, and old-matching cases).
+//   - revisionNumberPerOp: the pinned version's revision number per matching's view, used to
+//     compose a stable RequestId on the reactivation signal for receiver-side dedup.
+//
+// Both are only populated for UpdateWorkflowOptions operations; other operation types default
+// to zero values.
 func validatePostResetOperationInputs(ctx context.Context,
 	postResetOperations []*workflowpb.PostResetOperation,
 	matchingClient matchingservice.MatchingServiceClient,
-	versionMembershipCache worker_versioning.VersionMembershipCache,
+	versionCache worker_versioning.VersionMembershipAndReactivationStatusCache,
 	taskQueue string,
-	namespaceID string) error {
-	for _, operation := range postResetOperations {
+	namespaceID string) ([]bool, []int64, error) {
+	shouldSkipReactivationPerOp := make([]bool, len(postResetOperations))
+	revisionNumberPerOp := make([]int64, len(postResetOperations))
+	for i, operation := range postResetOperations {
 		switch op := operation.GetVariant().(type) {
 		case *workflowpb.PostResetOperation_UpdateWorkflowOptions_:
 			opts := op.UpdateWorkflowOptions.GetWorkflowExecutionOptions()
-			if err := worker_versioning.ValidateVersioningOverride(ctx, opts.GetVersioningOverride(), matchingClient, versionMembershipCache, taskQueue, enumspb.TASK_QUEUE_TYPE_WORKFLOW, namespaceID); err != nil {
-				return err
+			shouldSkipReactivation, revisionNumber, err := worker_versioning.ValidateVersioningOverrideAndGetReactivationEligibility(ctx, opts.GetVersioningOverride(), matchingClient, versionCache, taskQueue, enumspb.TASK_QUEUE_TYPE_WORKFLOW, namespaceID)
+			if err != nil {
+				return nil, nil, err
 			}
+			shouldSkipReactivationPerOp[i] = shouldSkipReactivation
+			revisionNumberPerOp[i] = revisionNumber
 		default:
-			return serviceerror.NewInvalidArgumentf("unsupported post reset operation: %T", op)
+			return nil, nil, serviceerror.NewInvalidArgumentf("unsupported post reset operation: %T", op)
 		}
 	}
-	return nil
+	return shouldSkipReactivationPerOp, revisionNumberPerOp, nil
 }
diff --git a/service/history/api/respondworkflowtaskcompleted/api.go b/service/history/api/respondworkflowtaskcompleted/api.go
index 105eff09e26..978923d1c95 100644
--- a/service/history/api/respondworkflowtaskcompleted/api.go
+++ b/service/history/api/respondworkflowtaskcompleted/api.go
@@ -64,7 +64,7 @@ type (
 		commandHandlerRegistry         *workflow.CommandHandlerRegistry
 		chasmWorkflowRegistry          *chasmworkflow.Registry
 		matchingClient                 matchingservice.MatchingServiceClient
-		versionMembershipCache         worker_versioning.VersionMembershipCache
+		versionCache                   worker_versioning.VersionMembershipAndReactivationStatusCache
 	}
 )
 
@@ -78,7 +78,7 @@ func NewWorkflowTaskCompletedHandler(
 	visibilityManager manager.VisibilityManager,
 	workflowConsistencyChecker api.WorkflowConsistencyChecker,
 	matchingClient matchingservice.MatchingServiceClient,
-	versionMembershipCache worker_versioning.VersionMembershipCache,
+	versionCache worker_versioning.VersionMembershipAndReactivationStatusCache,
 ) *WorkflowTaskCompletedHandler {
 	return &WorkflowTaskCompletedHandler{
 		config:                     shardContext.GetConfig(),
@@ -102,7 +102,7 @@ func NewWorkflowTaskCompletedHandler(
 		commandHandlerRegistry:         commandHandlerRegistry,
 		chasmWorkflowRegistry:          chasmWorkflowRegistry,
 		matchingClient:                 matchingClient,
-		versionMembershipCache:         versionMembershipCache,
+		versionCache:                   versionCache,
 	}
 }
 
@@ -410,7 +410,7 @@ func (handler *WorkflowTaskCompletedHandler) Invoke(
 			handler.commandHandlerRegistry,
 			handler.chasmWorkflowRegistry,
 			handler.matchingClient,
-			handler.versionMembershipCache,
+			handler.versionCache,
 		)
 
 		if responseMutations, err = workflowTaskHandler.handleCommands(
diff --git a/service/history/api/respondworkflowtaskcompleted/workflow_task_completed_handler.go b/service/history/api/respondworkflowtaskcompleted/workflow_task_completed_handler.go
index 399e0f43c83..abf58eb89ff 100644
--- a/service/history/api/respondworkflowtaskcompleted/workflow_task_completed_handler.go
+++ b/service/history/api/respondworkflowtaskcompleted/workflow_task_completed_handler.go
@@ -84,7 +84,7 @@ type (
 		commandHandlerRegistry *workflow.CommandHandlerRegistry
 		chasmWorkflowRegistry  *chasmworkflow.Registry
 		matchingClient         matchingservice.MatchingServiceClient
-		versionMembershipCache worker_versioning.VersionMembershipCache
+		versionCache           worker_versioning.VersionMembershipAndReactivationStatusCache
 	}
 
 	workflowTaskFailedCause struct {
@@ -126,7 +126,7 @@ func newWorkflowTaskCompletedHandler(
 	commandHandlerRegistry *workflow.CommandHandlerRegistry,
 	chasmWorkflowRegistry *chasmworkflow.Registry,
 	matchingClient matchingservice.MatchingServiceClient,
-	versionMembershipCache worker_versioning.VersionMembershipCache,
+	versionCache worker_versioning.VersionMembershipAndReactivationStatusCache,
 ) *workflowTaskCompletedHandler {
 	return &workflowTaskCompletedHandler{
 		identity:                identity,
@@ -161,7 +161,7 @@ func newWorkflowTaskCompletedHandler(
 		commandHandlerRegistry: commandHandlerRegistry,
 		chasmWorkflowRegistry:  chasmWorkflowRegistry,
 		matchingClient:         matchingClient,
-		versionMembershipCache: versionMembershipCache,
+		versionCache:           versionCache,
 	}
 }
 
@@ -1122,7 +1122,7 @@ func (handler *workflowTaskCompletedHandler) handleCommandContinueAsNewWorkflow(
 		handler.workflowTaskCompletedID,
 		parentNamespace,
 		attr,
-		worker_versioning.GetIsWFTaskQueueInVersionDetector(handler.matchingClient, handler.versionMembershipCache),
+		worker_versioning.GetIsWFTaskQueueInVersionDetector(handler.matchingClient, handler.versionCache),
 	)
 	if err != nil {
 		return nil, err
diff --git a/service/history/api/signalwithstartworkflow/api.go b/service/history/api/signalwithstartworkflow/api.go
index c1a07bc74ec..8fc6880f797 100644
--- a/service/history/api/signalwithstartworkflow/api.go
+++ b/service/history/api/signalwithstartworkflow/api.go
@@ -22,8 +22,7 @@ func Invoke(
 	shard historyi.ShardContext,
 	workflowConsistencyChecker api.WorkflowConsistencyChecker,
 	matchingClient matchingservice.MatchingServiceClient,
-	versionMembershipCache worker_versioning.VersionMembershipCache,
-	reactivationSignalCache worker_versioning.ReactivationSignalCache,
+	versionCache worker_versioning.VersionMembershipAndReactivationStatusCache,
 	reactivationSignaler api.VersionReactivationSignalerFn,
 ) (_ *historyservice.SignalWithStartWorkflowExecutionResponse, retError error) {
 	namespaceEntry, err := api.GetActiveNamespace(shard, namespace.ID(signalWithStartRequest.GetNamespaceId()), signalWithStartRequest.SignalWithStartRequest.WorkflowId)
@@ -71,7 +70,7 @@ func Invoke(
 	}
 
 	// Validation for versioning override, if any.
-	err = worker_versioning.ValidateVersioningOverride(ctx, request.GetVersioningOverride(), matchingClient, versionMembershipCache, request.GetTaskQueue().GetName(), enumspb.TASK_QUEUE_TYPE_WORKFLOW, namespaceID.String())
+	shouldSkipReactivation, revisionNumber, err := worker_versioning.ValidateVersioningOverrideAndGetReactivationEligibility(ctx, request.GetVersioningOverride(), matchingClient, versionCache, request.GetTaskQueue().GetName(), enumspb.TASK_QUEUE_TYPE_WORKFLOW, namespaceID.String())
 	if err != nil {
 		return nil, err
 	}
@@ -90,7 +89,7 @@ func Invoke(
 
 	// Notify version workflow if we're starting a new workflow pinned to a potentially drained version
 	if started {
-		api.ReactivateVersionWorkflowIfPinned(ctx, namespaceEntry, request.GetVersioningOverride(), reactivationSignalCache, reactivationSignaler, shard.GetConfig().EnableVersionReactivationSignals())
+		api.ReactivateVersionWorkflowIfPinned(ctx, namespaceEntry, request.GetVersioningOverride(), reactivationSignaler, shard.GetConfig().EnableVersionReactivationSignals(), shouldSkipReactivation, revisionNumber)
 	}
 
 	return &historyservice.SignalWithStartWorkflowExecutionResponse{
diff --git a/service/history/api/startworkflow/api.go b/service/history/api/startworkflow/api.go
index 2678b04890e..f5f2d25d004 100644
--- a/service/history/api/startworkflow/api.go
+++ b/service/history/api/startworkflow/api.go
@@ -58,9 +58,10 @@ type Starter struct {
 	request                    *historyservice.StartWorkflowExecutionRequest
 	namespace                  *namespace.Namespace
 	createOrUpdateLeaseFn      api.CreateOrUpdateLeaseFunc
-	versionMembershipCache     worker_versioning.VersionMembershipCache
-	reactivationSignalCache    worker_versioning.ReactivationSignalCache
+	versionCache               worker_versioning.VersionMembershipAndReactivationStatusCache
 	reactivationSignaler       api.VersionReactivationSignalerFn
+	shouldSkipReactivation     bool
+	revisionNumber             int64
 }
 
 // creationParams is a container for all information obtained from creating the uncommitted execution.
@@ -89,8 +90,7 @@ func NewStarter(
 	tokenSerializer *tasktoken.Serializer,
 	request *historyservice.StartWorkflowExecutionRequest,
 	matchingClient matchingservice.MatchingServiceClient,
-	versionMembershipCache worker_versioning.VersionMembershipCache,
-	reactivationSignalCache worker_versioning.ReactivationSignalCache,
+	versionCache worker_versioning.VersionMembershipAndReactivationStatusCache,
 	reactivationSignaler api.VersionReactivationSignalerFn,
 	createLeaseFn api.CreateOrUpdateLeaseFunc,
 ) (*Starter, error) {
@@ -109,8 +109,7 @@ func NewStarter(
 		request:                    request,
 		namespace:                  namespaceEntry,
 		createOrUpdateLeaseFn:      createLeaseFn,
-		versionMembershipCache:     versionMembershipCache,
-		reactivationSignalCache:    reactivationSignalCache,
+		versionCache:               versionCache,
 		reactivationSignaler:       reactivationSignaler,
 	}, nil
 }
@@ -136,7 +135,7 @@ func (s *Starter) prepare(ctx context.Context) error {
 	}
 
 	// Validation for versioning override, if any.
-	err = worker_versioning.ValidateVersioningOverride(ctx, request.GetVersioningOverride(), s.matchingClient, s.versionMembershipCache, request.GetTaskQueue().GetName(), enumspb.TASK_QUEUE_TYPE_WORKFLOW, s.namespace.ID().String())
+	s.shouldSkipReactivation, s.revisionNumber, err = worker_versioning.ValidateVersioningOverrideAndGetReactivationEligibility(ctx, request.GetVersioningOverride(), s.matchingClient, s.versionCache, request.GetTaskQueue().GetName(), enumspb.TASK_QUEUE_TYPE_WORKFLOW, s.namespace.ID().String())
 	if err != nil {
 		return err
 	}
@@ -213,7 +212,7 @@ func (s *Starter) Invoke(
 				// Notify version workflow if we are starting a workflow execution on a potentially drained version.
 				// Only signal when a new workflow was actually created (StartNew), not for deduped retries
 				// (StartDeduped) or reused existing workflows (StartReused) where the pinned override is not applied.
-				api.ReactivateVersionWorkflowIfPinned(ctx, s.namespace, s.request.StartRequest.GetVersioningOverride(), s.reactivationSignalCache, s.reactivationSignaler, s.shardContext.GetConfig().EnableVersionReactivationSignals())
+				api.ReactivateVersionWorkflowIfPinned(ctx, s.namespace, s.request.StartRequest.GetVersioningOverride(), s.reactivationSignaler, s.shardContext.GetConfig().EnableVersionReactivationSignals(), s.shouldSkipReactivation, s.revisionNumber)
 			}
 			return resp, outcome, conflictErr
 		}
@@ -221,7 +220,7 @@ func (s *Starter) Invoke(
 	}
 
 	// Notify version workflow if we're pinning to a potentially drained version
-	api.ReactivateVersionWorkflowIfPinned(ctx, s.namespace, s.request.StartRequest.GetVersioningOverride(), s.reactivationSignalCache, s.reactivationSignaler, s.shardContext.GetConfig().EnableVersionReactivationSignals())
+	api.ReactivateVersionWorkflowIfPinned(ctx, s.namespace, s.request.StartRequest.GetVersioningOverride(), s.reactivationSignaler, s.shardContext.GetConfig().EnableVersionReactivationSignals(), s.shouldSkipReactivation, s.revisionNumber)
 
 	resp, err = s.generateResponse(
 		creationParams.runID,
diff --git a/service/history/api/updateworkflowoptions/api.go b/service/history/api/updateworkflowoptions/api.go
index e7970ca8461..e324902c052 100644
--- a/service/history/api/updateworkflowoptions/api.go
+++ b/service/history/api/updateworkflowoptions/api.go
@@ -27,8 +27,7 @@ func Invoke(
 	shardCtx historyi.ShardContext,
 	workflowConsistencyChecker api.WorkflowConsistencyChecker,
 	matchingClient matchingservice.MatchingServiceClient,
-	versionMembershipCache worker_versioning.VersionMembershipCache,
-	reactivationSignalCache worker_versioning.ReactivationSignalCache,
+	versionCache worker_versioning.VersionMembershipAndReactivationStatusCache,
 	reactivationSignaler api.VersionReactivationSignalerFn,
 ) (*historyservice.UpdateWorkflowExecutionOptionsResponse, error) {
 	req := request.GetUpdateRequest()
@@ -40,6 +39,8 @@ func Invoke(
 
 	// Store versioning override to send reactivation signal after successful persistence
 	var versioningOverrideForReactivation *workflowpb.VersioningOverride
+	var shouldSkipReactivation bool
+	var revisionNumber int64
 
 	err = api.GetAndUpdateWorkflowWithNew(
 		ctx,
@@ -79,7 +80,7 @@ func Invoke(
 			}
 
 			// Validate versioning override, if any.
-			err = worker_versioning.ValidateVersioningOverride(ctx, requestedOptions.GetVersioningOverride(), matchingClient, versionMembershipCache, mutableState.GetExecutionInfo().GetTaskQueue(), enumspb.TASK_QUEUE_TYPE_WORKFLOW, ns.ID().String())
+			shouldSkipReactivation, revisionNumber, err = worker_versioning.ValidateVersioningOverrideAndGetReactivationEligibility(ctx, requestedOptions.GetVersioningOverride(), matchingClient, versionCache, mutableState.GetExecutionInfo().GetTaskQueue(), enumspb.TASK_QUEUE_TYPE_WORKFLOW, ns.ID().String())
 			if err != nil {
 				return nil, err
 			}
@@ -118,7 +119,7 @@ func Invoke(
 
 	// Notify version workflow if we're pinning to a potentially drained version.
 	// This is done after successful persistence to avoid signaling if the update fails.
-	api.ReactivateVersionWorkflowIfPinned(ctx, ns, versioningOverrideForReactivation, reactivationSignalCache, reactivationSignaler, shardCtx.GetConfig().EnableVersionReactivationSignals())
+	api.ReactivateVersionWorkflowIfPinned(ctx, ns, versioningOverrideForReactivation, reactivationSignaler, shardCtx.GetConfig().EnableVersionReactivationSignals(), shouldSkipReactivation, revisionNumber)
 
 	return ret, nil
 }
diff --git a/service/history/api/updateworkflowoptions/api_test.go b/service/history/api/updateworkflowoptions/api_test.go
index a2be42e271e..73787b07907 100644
--- a/service/history/api/updateworkflowoptions/api_test.go
+++ b/service/history/api/updateworkflowoptions/api_test.go
@@ -33,36 +33,32 @@ import (
 	"google.golang.org/protobuf/types/known/timestamppb"
 )
 
-type noopVersionMembershipCache struct{}
+type noopVersionCache struct{}
 
-func (noopVersionMembershipCache) Get(
+func (noopVersionCache) Get(
 	_ string,
 	_ string,
 	_ enumspb.TaskQueueType,
 	_ string,
 	_ string,
-) (isMember bool, ok bool) {
-	return false, false
+) (isMember bool, shouldSkipReactivation bool, revisionNumber int64, ok bool) {
+	return false, false, 0, false
 }
 
-func (noopVersionMembershipCache) Put(
+func (noopVersionCache) Put(
 	_ string,
 	_ string,
 	_ enumspb.TaskQueueType,
 	_ string,
 	_ string,
 	_ bool,
+	_ bool,
+	_ int64,
 ) {
 }
 
-type noopReactivationSignalCache struct{}
-
-func (noopReactivationSignalCache) ShouldSendSignal(_, _, _ string) bool {
-	return false // Always return false to skip sending signals in tests
-}
-
 // noopReactivationSignaler is a no-op signaler function for tests
-func noopReactivationSignaler(_ context.Context, _ *namespace.Namespace, _, _ string) error {
+func noopReactivationSignaler(_ context.Context, _ *namespace.Namespace, _, _ string, _ int64) error {
 	return nil
 }
 
@@ -330,9 +326,8 @@ func (s *updateWorkflowOptionsSuite) TestInvoke_Success() {
 		s.shardContext,
 		s.workflowConsistencyChecker,
 		s.mockMatchingClient,
-		noopVersionMembershipCache{},  // cache not meant to be used in this test
-		noopReactivationSignalCache{}, // cache not meant to be used in this test
-		noopReactivationSignaler,      // signaler not meant to be used in this test
+		noopVersionCache{},       // cache not meant to be used in this test
+		noopReactivationSignaler, // signaler not meant to be used in this test
 	)
 	s.NoError(err)
 	s.NotNil(resp)
diff --git a/service/history/api/worker_versioning_util.go b/service/history/api/worker_versioning_util.go
index b989b59d3a8..dee031418d5 100644
--- a/service/history/api/worker_versioning_util.go
+++ b/service/history/api/worker_versioning_util.go
@@ -11,32 +11,42 @@ import (
 // VersionReactivationSignalerFn is a function type for sending reactivation signals to version workflows.
 // This abstraction allows the history API layer to use the deployment client without importing it directly,
 // avoiding import cycles between history/api and worker/workerdeployment packages.
+// revisionNumber is the version's current revision per matching's view and is used by the signaler
+// to compose a cluster-wide-deterministic RequestId on the signal for receiver-side dedup.
 type VersionReactivationSignalerFn func(
 	ctx context.Context,
 	namespaceEntry *namespace.Namespace,
 	deploymentName, buildID string,
+	revisionNumber int64,
 ) error
 
 // ReactivateVersionWorkflowIfPinned sends a reactivation signal to the version workflow
-// when workflows are pinned to a potentially DRAINED/INACTIVE version. It also deduplicates
-// signals within the cache TTL window.
+// when workflows are pinned to a potentially DRAINED/INACTIVE version.
 // This is a fire-and-forget operation - the signal is sent asynchronously and errors are
-// logged by the signaler implementation.
+// logged by the signaler implementation. The signaler itself is responsible for per-pod
+// dedup by revision number; cross-pod duplicates fold at the receiver via a deterministic
+// UUID RequestId.
 //
 //nolint:revive,errcheck
 func ReactivateVersionWorkflowIfPinned(
 	ctx context.Context,
 	namespaceEntry *namespace.Namespace,
 	override *workflowpb.VersioningOverride,
-	signalCache worker_versioning.ReactivationSignalCache,
 	signaler VersionReactivationSignalerFn,
 	enabled bool,
+	shouldSkipReactivation bool,
+	revisionNumber int64,
 ) {
 	// Check if signals are enabled globally
 	if !enabled {
 		return
 	}
 
+	// Skip signal if matching confirmed the version is active or still draining.
+	if shouldSkipReactivation {
+		return
+	}
+
 	// Only process if we're pinning to a specific version
 	if !worker_versioning.OverrideIsPinned(override) {
 		return
@@ -47,19 +57,10 @@ func ReactivateVersionWorkflowIfPinned(
 		return
 	}
 
-	// Check cache - skip if signal was recently sent
-	if signalCache != nil && !signalCache.ShouldSendSignal(
-		namespaceEntry.ID().String(),
-		pinnedVersion.GetDeploymentName(),
-		pinnedVersion.GetBuildId(),
-	) {
-		return
-	}
-
 	// Send the signal asynchronously to avoid adding latency to the caller's request.
 	// Errors are logged by the signaler implementation (e.g. via convertAndRecordError). However,
 	// errors are not propagated to the caller as this is a fire-and-forget operation.
 	go func() {
-		signaler(context.Background(), namespaceEntry, pinnedVersion.GetDeploymentName(), pinnedVersion.GetBuildId()) //nolint:errcheck
+		signaler(context.Background(), namespaceEntry, pinnedVersion.GetDeploymentName(), pinnedVersion.GetBuildId(), revisionNumber) //nolint:errcheck
 	}()
 }
diff --git a/service/history/configs/config.go b/service/history/configs/config.go
index c7d911df239..d9c84af4564 100644
--- a/service/history/configs/config.go
+++ b/service/history/configs/config.go
@@ -416,16 +416,14 @@ type Config struct {
 	NumConsecutiveWorkflowTaskProblemsToTriggerSearchAttribute dynamicconfig.IntPropertyFnWithNamespaceFilter
 
 	// Worker-Versioning related settings
-	EnableSuggestCaNOnNewTargetVersion    dynamicconfig.BoolPropertyFnWithNamespaceFilter
-	EnableSendTargetVersionChanged        dynamicconfig.BoolPropertyFnWithNamespaceFilter
-	UseRevisionNumberForWorkerVersioning  dynamicconfig.BoolPropertyFnWithNamespaceFilter
-	VersionMembershipCacheTTL             dynamicconfig.DurationPropertyFn
-	VersionMembershipCacheMaxSize         dynamicconfig.IntPropertyFn
-	VersionReactivationSignalCacheTTL     dynamicconfig.DurationPropertyFn
-	VersionReactivationSignalCacheMaxSize dynamicconfig.IntPropertyFn
-	EnableVersionReactivationSignals      dynamicconfig.BoolPropertyFn
-	RoutingInfoCacheTTL                   dynamicconfig.DurationPropertyFn
-	RoutingInfoCacheMaxSize               dynamicconfig.IntPropertyFn
+	EnableSuggestCaNOnNewTargetVersion   dynamicconfig.BoolPropertyFnWithNamespaceFilter
+	EnableSendTargetVersionChanged       dynamicconfig.BoolPropertyFnWithNamespaceFilter
+	UseRevisionNumberForWorkerVersioning dynamicconfig.BoolPropertyFnWithNamespaceFilter
+	VersionMembershipCacheTTL            dynamicconfig.DurationPropertyFn
+	VersionMembershipCacheMaxSize        dynamicconfig.IntPropertyFn
+	EnableVersionReactivationSignals     dynamicconfig.BoolPropertyFn
+	RoutingInfoCacheTTL                  dynamicconfig.DurationPropertyFn
+	RoutingInfoCacheMaxSize              dynamicconfig.IntPropertyFn
 }
 
 // NewConfig returns new service config with default values
@@ -797,16 +795,14 @@ func NewConfig(
 		NumConsecutiveWorkflowTaskProblemsToTriggerSearchAttribute: dynamicconfig.NumConsecutiveWorkflowTaskProblemsToTriggerSearchAttribute.Get(dc),
 
 		// Worker-Versioning related
-		UseRevisionNumberForWorkerVersioning:  dynamicconfig.UseRevisionNumberForWorkerVersioning.Get(dc),
-		EnableSuggestCaNOnNewTargetVersion:    dynamicconfig.EnableSuggestCaNOnNewTargetVersion.Get(dc),
-		EnableSendTargetVersionChanged:        dynamicconfig.EnableSendTargetVersionChanged.Get(dc),
-		VersionMembershipCacheTTL:             dynamicconfig.VersionMembershipCacheTTL.Get(dc),
-		VersionMembershipCacheMaxSize:         dynamicconfig.VersionMembershipCacheMaxSize.Get(dc),
-		VersionReactivationSignalCacheTTL:     dynamicconfig.VersionReactivationSignalCacheTTL.Get(dc),
-		VersionReactivationSignalCacheMaxSize: dynamicconfig.VersionReactivationSignalCacheMaxSize.Get(dc),
-		EnableVersionReactivationSignals:      dynamicconfig.EnableVersionReactivationSignals.Get(dc),
-		RoutingInfoCacheTTL:                   dynamicconfig.RoutingInfoCacheTTL.Get(dc),
-		RoutingInfoCacheMaxSize:               dynamicconfig.RoutingInfoCacheMaxSize.Get(dc),
+		UseRevisionNumberForWorkerVersioning: dynamicconfig.UseRevisionNumberForWorkerVersioning.Get(dc),
+		EnableSuggestCaNOnNewTargetVersion:   dynamicconfig.EnableSuggestCaNOnNewTargetVersion.Get(dc),
+		EnableSendTargetVersionChanged:       dynamicconfig.EnableSendTargetVersionChanged.Get(dc),
+		VersionMembershipCacheTTL:            dynamicconfig.VersionMembershipCacheTTL.Get(dc),
+		VersionMembershipCacheMaxSize:        dynamicconfig.VersionMembershipCacheMaxSize.Get(dc),
+		EnableVersionReactivationSignals:     dynamicconfig.EnableVersionReactivationSignals.Get(dc),
+		RoutingInfoCacheTTL:                  dynamicconfig.RoutingInfoCacheTTL.Get(dc),
+		RoutingInfoCacheMaxSize:              dynamicconfig.RoutingInfoCacheMaxSize.Get(dc),
 	}
 
 	return cfg
diff --git a/service/history/fx.go b/service/history/fx.go
index c3b1515ebfa..c8b8a36b370 100644
--- a/service/history/fx.go
+++ b/service/history/fx.go
@@ -89,7 +89,6 @@ var Module = fx.Options(
 	fx.Provide(NewService),
 	fx.Provide(ReplicationProgressCacheProvider),
 	fx.Provide(VersionMembershipCacheProvider),
-	fx.Provide(ReactivationSignalCacheProvider),
 	workerdeployment.ClientModule,
 	fx.Provide(RoutingInfoCacheProvider),
 	fx.Invoke(ServiceLifetimeHooks),
@@ -406,7 +405,7 @@ func VersionMembershipCacheProvider(
 	lc fx.Lifecycle,
 	serviceConfig *configs.Config,
 	metricsHandler metrics.Handler,
-) worker_versioning.VersionMembershipCache {
+) worker_versioning.VersionMembershipAndReactivationStatusCache {
 	c := commoncache.New(serviceConfig.VersionMembershipCacheMaxSize(), &commoncache.Options{
 		TTL: max(1*time.Second, serviceConfig.VersionMembershipCacheTTL()),
 	})
@@ -416,24 +415,7 @@ func VersionMembershipCacheProvider(
 			return nil
 		},
 	})
-	return worker_versioning.NewVersionMembershipCache(c, metricsHandler)
-}
-
-func ReactivationSignalCacheProvider(
-	lc fx.Lifecycle,
-	serviceConfig *configs.Config,
-	metricsHandler metrics.Handler,
-) worker_versioning.ReactivationSignalCache {
-	c := commoncache.New(serviceConfig.VersionReactivationSignalCacheMaxSize(), &commoncache.Options{
-		TTL: max(1*time.Second, serviceConfig.VersionReactivationSignalCacheTTL()),
-	})
-	lc.Append(fx.Hook{
-		OnStop: func(context.Context) error {
-			c.Stop()
-			return nil
-		},
-	})
-	return worker_versioning.NewReactivationSignalCache(c, metricsHandler)
+	return worker_versioning.NewVersionMembershipAndReactivationStatusCache(c, metricsHandler)
 }
 
 func RoutingInfoCacheProvider(
diff --git a/service/history/history_engine.go b/service/history/history_engine.go
index f3d85098f9f..2ee68ae48f7 100644
--- a/service/history/history_engine.go
+++ b/service/history/history_engine.go
@@ -136,8 +136,7 @@ type (
 		workflowConsistencyChecker api.WorkflowConsistencyChecker
 		chasmEngine                chasm.Engine
 		versionChecker             headers.VersionChecker
-		versionMembershipCache     worker_versioning.VersionMembershipCache
-		reactivationSignalCache    worker_versioning.ReactivationSignalCache
+		versionCache               worker_versioning.VersionMembershipAndReactivationStatusCache
 		workerDeploymentClient     workerdeployment.Client
 		routingInfoCache           worker_versioning.RoutingInfoCache
 		tracer                     trace.Tracer
@@ -160,8 +159,7 @@ func NewEngineWithShardContext(
 	sdkClientFactory sdk.ClientFactory,
 	eventNotifier events.Notifier,
 	config *configs.Config,
-	versionMembershipCache worker_versioning.VersionMembershipCache,
-	reactivationSignalCache worker_versioning.ReactivationSignalCache,
+	versionCache worker_versioning.VersionMembershipAndReactivationStatusCache,
 	workerDeploymentClient workerdeployment.Client,
 	routingInfoCache worker_versioning.RoutingInfoCache,
 	rawMatchingClient matchingservice.MatchingServiceClient,
@@ -235,8 +233,7 @@ func NewEngineWithShardContext(
 		outboundQueueCBPool:        outboundQueueCBPool,
 		testHooks:                  testHooks,
 		chasmEngine:                chasmEngine,
-		versionMembershipCache:     versionMembershipCache,
-		reactivationSignalCache:    reactivationSignalCache,
+		versionCache:               versionCache,
 		workerDeploymentClient:     workerDeploymentClient,
 		routingInfoCache:           routingInfoCache,
 	}
@@ -416,8 +413,7 @@ func (e *historyEngineImpl) StartWorkflowExecution(
 		e.tokenSerializer,
 		startRequest,
 		e.matchingClient,
-		e.versionMembershipCache,
-		e.reactivationSignalCache,
+		e.versionCache,
 		e.workerDeploymentClient.SignalVersionReactivation,
 		api.NewWorkflowLeaseAndContext,
 	)
@@ -440,8 +436,7 @@ func (e *historyEngineImpl) ExecuteMultiOperation(
 		e.workflowConsistencyChecker,
 		e.tokenSerializer,
 		e.matchingClient,
-		e.versionMembershipCache,
-		e.reactivationSignalCache,
+		e.versionCache,
 		e.workerDeploymentClient.SignalVersionReactivation,
 		e.testHooks,
 	)
@@ -589,7 +584,7 @@ func (e *historyEngineImpl) RespondWorkflowTaskCompleted(
 		e.persistenceVisibilityMgr,
 		e.workflowConsistencyChecker,
 		e.matchingClient,
-		e.versionMembershipCache,
+		e.versionCache,
 	)
 	return h.Invoke(ctx, req)
 }
@@ -658,7 +653,7 @@ func (e *historyEngineImpl) SignalWithStartWorkflowExecution(
 	ctx context.Context,
 	req *historyservice.SignalWithStartWorkflowExecutionRequest,
 ) (_ *historyservice.SignalWithStartWorkflowExecutionResponse, retError error) {
-	return signalwithstartworkflow.Invoke(ctx, req, e.shardContext, e.workflowConsistencyChecker, e.matchingClient, e.versionMembershipCache, e.reactivationSignalCache, e.workerDeploymentClient.SignalVersionReactivation)
+	return signalwithstartworkflow.Invoke(ctx, req, e.shardContext, e.workflowConsistencyChecker, e.matchingClient, e.versionCache, e.workerDeploymentClient.SignalVersionReactivation)
 }
 
 func (e *historyEngineImpl) UpdateWorkflowExecution(
@@ -859,7 +854,7 @@ func (e *historyEngineImpl) ResetWorkflowExecution(
 	ctx context.Context,
 	req *historyservice.ResetWorkflowExecutionRequest,
 ) (*historyservice.ResetWorkflowExecutionResponse, error) {
-	return resetworkflow.Invoke(ctx, req, e.shardContext, e.workflowConsistencyChecker, e.matchingClient, e.versionMembershipCache, e.reactivationSignalCache, e.workerDeploymentClient.SignalVersionReactivation)
+	return resetworkflow.Invoke(ctx, req, e.shardContext, e.workflowConsistencyChecker, e.matchingClient, e.versionCache, e.workerDeploymentClient.SignalVersionReactivation)
 }
 
 // UpdateWorkflowExecutionOptions updates the options of a specific workflow execution.
@@ -868,7 +863,7 @@ func (e *historyEngineImpl) UpdateWorkflowExecutionOptions(
 	ctx context.Context,
 	req *historyservice.UpdateWorkflowExecutionOptionsRequest,
 ) (*historyservice.UpdateWorkflowExecutionOptionsResponse, error) {
-	return updateworkflowoptions.Invoke(ctx, req, e.shardContext, e.workflowConsistencyChecker, e.matchingClient, e.versionMembershipCache, e.reactivationSignalCache, e.workerDeploymentClient.SignalVersionReactivation)
+	return updateworkflowoptions.Invoke(ctx, req, e.shardContext, e.workflowConsistencyChecker, e.matchingClient, e.versionCache, e.workerDeploymentClient.SignalVersionReactivation)
 }
 
 func (e *historyEngineImpl) NotifyNewHistoryEvent(
diff --git a/service/history/history_engine2_test.go b/service/history/history_engine2_test.go
index c7607bf78bc..fd1115e7118 100644
--- a/service/history/history_engine2_test.go
+++ b/service/history/history_engine2_test.go
@@ -104,7 +104,7 @@ type (
 // by the history engine as a function value.
 type noopWorkerDeploymentClient struct{ workerdeployment.Client }
 
-func (noopWorkerDeploymentClient) SignalVersionReactivation(context.Context, *namespace.Namespace, string, string) error {
+func (noopWorkerDeploymentClient) SignalVersionReactivation(context.Context, *namespace.Namespace, string, string, int64) error {
 	return nil
 }
 
diff --git a/service/history/history_engine_factory.go b/service/history/history_engine_factory.go
index f53f415db5a..25904c0668d 100644
--- a/service/history/history_engine_factory.go
+++ b/service/history/history_engine_factory.go
@@ -52,8 +52,7 @@ type (
 		PersistenceRateLimiter          replication.PersistenceRateLimiter
 		TestHooks                       testhooks.TestHooks
 		ChasmEngine                     chasm.Engine
-		VersionMembershipCache          worker_versioning.VersionMembershipCache
-		ReactivationSignalCache         worker_versioning.ReactivationSignalCache
+		VersionMembershipCache          worker_versioning.VersionMembershipAndReactivationStatusCache
 		WorkerDeploymentClient          workerdeployment.Client
 		RoutingInfoCache                worker_versioning.RoutingInfoCache
 	}
@@ -74,7 +73,6 @@ func (f *historyEngineFactory) CreateEngine(
 		f.EventNotifier,
 		f.Config,
 		f.VersionMembershipCache,
-		f.ReactivationSignalCache,
 		f.WorkerDeploymentClient,
 		f.RoutingInfoCache,
 		f.RawMatchingClient,
diff --git a/service/history/queue_factory_base_test.go b/service/history/queue_factory_base_test.go
index 059c9e74c52..af93947fa10 100644
--- a/service/history/queue_factory_base_test.go
+++ b/service/history/queue_factory_base_test.go
@@ -159,5 +159,5 @@ type unusedDependencies struct {
 	cache.Cache
 	chasm.Engine
 	ChasmRegistry *chasm.Registry
-	worker_versioning.VersionMembershipCache
+	worker_versioning.VersionMembershipAndReactivationStatusCache
 }
diff --git a/service/history/transfer_queue_active_task_executor.go b/service/history/transfer_queue_active_task_executor.go
index 3468591ff23..71639f778c3 100644
--- a/service/history/transfer_queue_active_task_executor.go
+++ b/service/history/transfer_queue_active_task_executor.go
@@ -54,7 +54,7 @@ type (
 
 		workflowResetter        ndc.WorkflowResetter
 		parentClosePolicyClient parentclosepolicy.Client
-		versionMembershipCache  worker_versioning.VersionMembershipCache
+		versionCache            worker_versioning.VersionMembershipAndReactivationStatusCache
 	}
 )
 
@@ -69,7 +69,7 @@ func newTransferQueueActiveTaskExecutor(
 	matchingRawClient resource.MatchingRawClient,
 	visibilityManager manager.VisibilityManager,
 	chasmEngine chasm.Engine,
-	versionMembershipCache worker_versioning.VersionMembershipCache,
+	versionCache worker_versioning.VersionMembershipAndReactivationStatusCache,
 ) queues.Executor {
 	return &transferQueueActiveTaskExecutor{
 		transferQueueTaskExecutorBase: newTransferQueueTaskExecutorBase(
@@ -93,7 +93,7 @@ func newTransferQueueActiveTaskExecutor(
 			sdkClientFactory,
 			config.NumParentClosePolicySystemWorkflows(),
 		),
-		versionMembershipCache: versionMembershipCache,
+		versionCache: versionCache,
 	}
 }
 
@@ -925,7 +925,7 @@ func (t *transferQueueActiveTaskExecutor) processStartChildExecution(
 		if attributes.GetNamespaceId() != mutableState.GetExecutionInfo().GetNamespaceId() { // don't inherit pinned version if child is in a different namespace
 			inheritedPinnedVersion = nil
 		} else if newTQ != mutableState.GetExecutionInfo().GetTaskQueue() {
-			newTQInPinnedVersion, err = worker_versioning.GetIsWFTaskQueueInVersionDetector(t.matchingRawClient, t.versionMembershipCache)(ctx, attributes.GetNamespaceId(), newTQ, inheritedPinnedVersion)
+			newTQInPinnedVersion, err = worker_versioning.GetIsWFTaskQueueInVersionDetector(t.matchingRawClient, t.versionCache)(ctx, attributes.GetNamespaceId(), newTQ, inheritedPinnedVersion)
 			if err != nil {
 				return fmt.Errorf("error determining child task queue presence in inherited version: %w", err)
 			}
@@ -964,7 +964,7 @@ func (t *transferQueueActiveTaskExecutor) processStartChildExecution(
 			if attributes.GetNamespaceId() != mutableState.GetExecutionInfo().GetNamespaceId() { // don't inherit auto upgrade info if child is in a different namespace
 				inheritedAutoUpgradeInfo = nil
 			} else if newTQ != mutableState.GetExecutionInfo().GetTaskQueue() {
-				TQInSourceDeploymentVersion, err := worker_versioning.GetIsWFTaskQueueInVersionDetector(t.matchingRawClient, t.versionMembershipCache)(ctx, attributes.GetNamespaceId(), newTQ, inheritedAutoUpgradeInfo.GetSourceDeploymentVersion())
+				TQInSourceDeploymentVersion, err := worker_versioning.GetIsWFTaskQueueInVersionDetector(t.matchingRawClient, t.versionCache)(ctx, attributes.GetNamespaceId(), newTQ, inheritedAutoUpgradeInfo.GetSourceDeploymentVersion())
 				if err != nil {
 					return fmt.Errorf("error determining child task queue presence in inherited version: %w", err)
 				}
diff --git a/service/history/transfer_queue_factory.go b/service/history/transfer_queue_factory.go
index c83c96efdd1..1de358885d4 100644
--- a/service/history/transfer_queue_factory.go
+++ b/service/history/transfer_queue_factory.go
@@ -32,7 +32,7 @@ type (
 		HistoryRawClient       resource.HistoryRawClient
 		MatchingRawClient      resource.MatchingRawClient
 		VisibilityManager      manager.VisibilityManager
-		VersionMembershipCache worker_versioning.VersionMembershipCache
+		VersionMembershipCache worker_versioning.VersionMembershipAndReactivationStatusCache
 	}
 
 	transferQueueFactory struct {
diff --git a/service/matching/matching_engine.go b/service/matching/matching_engine.go
index 3a192299c2a..b83c704f606 100644
--- a/service/matching/matching_engine.go
+++ b/service/matching/matching_engine.go
@@ -3462,8 +3462,25 @@ func (e *matchingEngineImpl) CheckTaskQueueVersionMembership(
 	}
 
 	typedUserData := userData.GetData().GetPerType()[int32(request.GetTaskQueueType())]
-	present := worker_versioning.HasDeploymentVersion(typedUserData.GetDeploymentData(), request.GetVersion())
-	return &matchingservice.CheckTaskQueueVersionMembershipResponse{IsMember: present}, nil
+	deploymentData := typedUserData.GetDeploymentData()
+	present := worker_versioning.HasDeploymentVersion(deploymentData, request.GetVersion())
+
+	// Report whether the version is active-or-draining so callers can skip sending
+	// reactivation signals to versions that don't need one (CURRENT/RAMPING/DRAINING —
+	// see worker_versioning.ShouldSkipReactivation). The revision number flows back
+	// so history can compose a cluster-wide-deterministic RequestId on the reactivation
+	// signal for receiver-side dedup.
+	shouldSkipReactivation, revisionNumber := worker_versioning.ShouldSkipReactivation(
+		deploymentData,
+		request.GetVersion().GetDeploymentName(),
+		request.GetVersion().GetBuildId(),
+	)
+
+	return &matchingservice.CheckTaskQueueVersionMembershipResponse{
+		IsMember:               present,
+		ShouldSkipReactivation: shouldSkipReactivation,
+		RevisionNumber:         revisionNumber,
+	}, nil
 }
 
 func (e *matchingEngineImpl) UpdateTaskQueueConfig(
diff --git a/service/worker/workerdeployment/client.go b/service/worker/workerdeployment/client.go
index 747d293503d..e0c76958fab 100644
--- a/service/worker/workerdeployment/client.go
+++ b/service/worker/workerdeployment/client.go
@@ -5,6 +5,7 @@ import (
 	"errors"
 	"fmt"
 	"sort"
+	"strconv"
 	"strings"
 	"time"
 
@@ -26,6 +27,7 @@ import (
 	"go.temporal.io/server/api/matchingservice/v1"
 	"go.temporal.io/server/common"
 	"go.temporal.io/server/common/backoff"
+	"go.temporal.io/server/common/cache"
 	"go.temporal.io/server/common/dynamicconfig"
 	"go.temporal.io/server/common/log"
 	"go.temporal.io/server/common/log/tag"
@@ -205,10 +207,14 @@ type Client interface {
 	// SignalVersionReactivation sends a reactivation signal to a version workflow.
 	// Used when workflows are pinned to a potentially DRAINED/INACTIVE version.
 	// This is a fire-and-forget operation - errors are logged but returned for caller handling.
+	// revisionNumber is used to compose a stable RequestId on the signal so concurrent signals
+	// for the same (deployment, buildID, revisionNumber) tuple are deduplicated by the receiver
+	// via Temporal's built-in pendingSignalRequestedIDs mechanism.
 	SignalVersionReactivation(
 		ctx context.Context,
 		namespaceEntry *namespace.Namespace,
 		deploymentName, buildID string,
+		revisionNumber int64,
 	) error
 
 	ValidateComputeConfig(
@@ -226,6 +232,13 @@ type ErrRegister struct{ error }
 var retryPolicy = backoff.NewExponentialRetryPolicy(100 * time.Millisecond).WithExpirationInterval(1 * time.Minute)
 
 // ClientImpl implements Client
+// reactivationVersionKey identifies one target version workflow for reactivation-signal dedup.
+type reactivationVersionKey struct {
+	namespaceID    string
+	deploymentName string
+	buildID        string
+}
+
 type ClientImpl struct {
 	logger                           log.Logger
 	historyClient                    historyservice.HistoryServiceClient
@@ -238,6 +251,14 @@ type ClientImpl struct {
 	maxDeployments                   dynamicconfig.IntPropertyFnWithNamespaceFilter
 	testHooks                        testhooks.TestHooks
 	metricsHandler                   metrics.Handler
+
+	// highestRevSignaledToVersionWf is a per-pod LRU that holds, for each target version
+	// workflow, the highest revision number this pod has successfully signaled for
+	// reactivation. A reactivation signal for the same or older revision is skipped.
+	// Size-bounded by ReactivationSignalDedupCacheMaxSize; LRU eviction is pure memory
+	// hygiene, not part of the dedup contract. Cross-pod deduplication is handled
+	// separately by the deterministic UUID RequestId on each signal.
+	highestRevSignaledToVersionWf cache.Cache
 }
 
 func (d *ClientImpl) SetManager(
@@ -1988,12 +2009,48 @@ func (d *ClientImpl) SignalVersionReactivation(
 	ctx context.Context,
 	namespaceEntry *namespace.Namespace,
 	deploymentName, buildID string,
+	revisionNumber int64,
 ) (retErr error) {
 	//revive:disable-next-line:defer
 	defer d.convertAndRecordError("SignalVersionReactivation", deploymentName, &retErr, buildID)()
 
+	key := reactivationVersionKey{
+		namespaceID:    namespaceEntry.ID().String(),
+		deploymentName: deploymentName,
+		buildID:        buildID,
+	}
+	metricsHandler := d.metricsHandler.WithTags(
+		metrics.CacheTypeTag(metrics.ReactivationSignalDedupCacheTypeTagValue),
+		metrics.OperationTag(metrics.ReactivationSignalDedupScope),
+		metrics.NamespaceIDTag(namespaceEntry.ID().String()),
+	)
+	metrics.CacheRequests.With(metricsHandler).Record(1)
+
+	if stored := d.highestRevSignaledToVersionWf.Get(key); stored != nil {
+		if storedRev, ok := stored.(int64); ok && revisionNumber <= storedRev {
+			// This pod has already signaled the target version workflow at this revision
+			// or a newer one; skip to avoid a redundant RPC. Another pod may still send;
+			// the receiver dedups via the deterministic UUID RequestId.
+			return nil
+		}
+	}
+	metrics.CacheMissCounter.With(metricsHandler).Record(1)
+
 	workflowID := GenerateVersionWorkflowID(deploymentName, buildID)
 
+	// Deterministic UUID v5 RequestId derived from the revision number. Multiple history
+	// pods that independently decide to reactivate the same version at the same revision
+	// compute the same RequestId and fold into a single signal delivery, since the receiver
+	// dedups on RequestId.
+	//
+	// Revision alone is enough input because the dedup is scoped to this one version
+	// workflow (addressed by workflowID); different (deployment, build) pairs at the same
+	// revision don't collide because they're different workflows.
+	requestID := uuid.NewSHA1(
+		uuid.Nil,
+		[]byte("reactivation-signal:"+strconv.FormatInt(revisionNumber, 10)),
+	).String()
+
 	signalRequest := &historyservice.SignalWorkflowExecutionRequest{
 		NamespaceId: namespaceEntry.ID().String(),
 		SignalRequest: &workflowservice.SignalWorkflowExecutionRequest{
@@ -2004,11 +2061,19 @@ func (d *ClientImpl) SignalVersionReactivation(
 			SignalName: ReactivateVersionSignalName,
 			Input:      nil,
 			Identity:   "history-service",
+			RequestId:  requestID,
 		},
 	}
 
 	_, err := d.historyClient.SignalWorkflowExecution(ctx, signalRequest)
-	return err
+	if err != nil {
+		return err
+	}
+
+	// Record success so subsequent calls to the same version workflow for this or older
+	// revisions skip the RPC.
+	d.highestRevSignaledToVersionWf.Put(key, revisionNumber)
+	return nil
 }
 
 func (d *ClientImpl) getSyncBatchSize() int32 {
diff --git a/service/worker/workerdeployment/fx.go b/service/worker/workerdeployment/fx.go
index 703024e87ec..aaceb4241cd 100644
--- a/service/worker/workerdeployment/fx.go
+++ b/service/worker/workerdeployment/fx.go
@@ -1,12 +1,14 @@
 package workerdeployment
 
 import (
+	"context"
 	"time"
 
 	wciclient "go.temporal.io/auto-scaled-workers/wci/client"
 	sdkworker "go.temporal.io/sdk/worker"
 	"go.temporal.io/sdk/workflow"
 	deploymentspb "go.temporal.io/server/api/deployment/v1"
+	"go.temporal.io/server/common/cache"
 	"go.temporal.io/server/common/dynamicconfig"
 	"go.temporal.io/server/common/log"
 	"go.temporal.io/server/common/metrics"
@@ -67,6 +69,7 @@ var Module = fx.Options(
 )
 
 func ClientProvider(
+	lc fx.Lifecycle,
 	logger log.Logger,
 	historyClient resource.HistoryClient,
 	matchingClient resource.MatchingClient,
@@ -76,6 +79,13 @@ func ClientProvider(
 	testHooks testhooks.TestHooks,
 	metricsHandler metrics.Handler,
 ) Client {
+	highestRevSignaledToVersionWf := cache.New(dynamicconfig.ReactivationSignalDedupCacheMaxSize.Get(dc)(), nil)
+	lc.Append(fx.Hook{
+		OnStop: func(context.Context) error {
+			highestRevSignaledToVersionWf.Stop()
+			return nil
+		},
+	})
 	return &ClientImpl{
 		logger:                           logger,
 		historyClient:                    historyClient,
@@ -88,6 +98,7 @@ func ClientProvider(
 		maxDeployments:                   dynamicconfig.MatchingMaxDeployments.Get(dc),
 		testHooks:                        testHooks,
 		metricsHandler:                   metricsHandler,
+		highestRevSignaledToVersionWf:    highestRevSignaledToVersionWf,
 	}
 }
 
diff --git a/service/worker/workerdeployment/util_test.go b/service/worker/workerdeployment/util_test.go
index ebee3c86653..2b5eebbff80 100644
--- a/service/worker/workerdeployment/util_test.go
+++ b/service/worker/workerdeployment/util_test.go
@@ -1,8 +1,10 @@
 package workerdeployment
 
 import (
+	"context"
 	"fmt"
 	"os"
+	"regexp"
 	"strings"
 	"sync"
 	"testing"
@@ -13,14 +15,19 @@ import (
 	deploymentpb "go.temporal.io/api/deployment/v1"
 	enumspb "go.temporal.io/api/enums/v1"
 	"go.temporal.io/api/serviceerror"
+	"go.temporal.io/server/api/historyservice/v1"
 	"go.temporal.io/server/api/historyservicemock/v1"
 	persistencespb "go.temporal.io/server/api/persistence/v1"
+	"go.temporal.io/server/common/cache"
+	"go.temporal.io/server/common/log"
+	"go.temporal.io/server/common/metrics"
 	"go.temporal.io/server/common/namespace"
 	"go.temporal.io/server/common/persistence/visibility/manager"
 	"go.temporal.io/server/common/worker_versioning"
 	"go.temporal.io/server/service/history/consts"
 	update2 "go.temporal.io/server/service/history/workflow/update"
 	"go.uber.org/mock/gomock"
+	"google.golang.org/grpc"
 )
 
 // testMaxIDLengthLimit is the current default value used by dynamic config for
@@ -68,8 +75,11 @@ func (d *deploymentWorkflowClientSuite) SetupTest() {
 		BuildId:    testBuildID,
 	}
 	d.deploymentClient = &ClientImpl{
-		historyClient:     d.mockHistoryClient,
-		visibilityManager: d.VisibilityManager,
+		logger:                        log.NewNoopLogger(),
+		historyClient:                 d.mockHistoryClient,
+		visibilityManager:             d.VisibilityManager,
+		metricsHandler:                metrics.NoopMetricsHandler,
+		highestRevSignaledToVersionWf: cache.New(128, nil),
 	}
 
 }
@@ -382,3 +392,146 @@ func TestIsRetryableQueryError(t *testing.T) {
 		require.False(t, isRetryableQueryError(err))
 	})
 }
+
+// TestSignalVersionReactivation_RequestIdFormat verifies that SignalVersionReactivation
+// produces a deterministic UUID v5 RequestId derived from the revision number. Every
+// history pod that observes the same revisionNumber must produce the same RequestId so
+// the receiver collapses concurrent signals on the same dedup key.
+func (d *deploymentWorkflowClientSuite) TestSignalVersionReactivation_RequestIdFormat() {
+	testCases := []struct {
+		name           string
+		deploymentName string
+		buildID        string
+		revisionNumber int64
+	}{
+		{
+			name:           "non-zero revision",
+			deploymentName: "my-deployment",
+			buildID:        "build-42",
+			revisionNumber: 7,
+		},
+		{
+			// Distinct (deployment, build) from other cases so per-pod dedup in the client
+			// doesn't skip this call. Only the RequestId format is under test here.
+			name:           "zero revision (legacy format / never synced)",
+			deploymentName: "legacy-deployment",
+			buildID:        "legacy-build",
+			revisionNumber: 0,
+		},
+		{
+			name:           "same revision, different deployment/build — same RequestId (workflow scoping comes from WorkflowID)",
+			deploymentName: "other-deployment",
+			buildID:        "build-1",
+			revisionNumber: 7,
+		},
+	}
+
+	uuidRe := regexp.MustCompile(`^[0-9a-f]{8}-[0-9a-f]{4}-5[0-9a-f]{3}-[0-9a-f]{4}-[0-9a-f]{12}$`)
+	reqIDsByRevision := map[int64]string{}
+
+	for _, tc := range testCases {
+		d.Run(tc.name, func() {
+			var capturedReqID string
+			d.mockHistoryClient.EXPECT().
+				SignalWorkflowExecution(gomock.Any(), gomock.Any()).
+				DoAndReturn(func(_ context.Context, req *historyservice.SignalWorkflowExecutionRequest, _ ...grpc.CallOption) (*historyservice.SignalWorkflowExecutionResponse, error) {
+					capturedReqID = req.GetSignalRequest().GetRequestId()
+					d.Equal(ReactivateVersionSignalName, req.GetSignalRequest().GetSignalName())
+					d.Equal(GenerateVersionWorkflowID(tc.deploymentName, tc.buildID), req.GetSignalRequest().GetWorkflowExecution().GetWorkflowId())
+					return &historyservice.SignalWorkflowExecutionResponse{}, nil
+				})
+
+			err := d.deploymentClient.SignalVersionReactivation(
+				context.Background(),
+				d.ns,
+				tc.deploymentName,
+				tc.buildID,
+				tc.revisionNumber,
+			)
+			d.NoError(err)
+
+			// RequestId must be a UUID v5 (the "5" in the third group marks name-based SHA-1).
+			d.Regexp(uuidRe, capturedReqID)
+
+			// Determinism: identical revisionNumber across calls must produce identical RequestIds,
+			// regardless of deploymentName/buildID.
+			if prev, ok := reqIDsByRevision[tc.revisionNumber]; ok {
+				d.Equal(prev, capturedReqID)
+			} else {
+				reqIDsByRevision[tc.revisionNumber] = capturedReqID
+			}
+		})
+	}
+}
+
+// TestSignalVersionReactivation_DedupsByRevision verifies the per-pod dedup in
+// SignalVersionReactivation: once a revision (or higher) has been signaled for a given
+// version workflow, subsequent calls at the same-or-lower revision skip the RPC.
+func (d *deploymentWorkflowClientSuite) TestSignalVersionReactivation_DedupsByRevision() {
+	const (
+		dep   = "my-deployment"
+		build = "build-1"
+	)
+
+	// First call fires.
+	d.mockHistoryClient.EXPECT().
+		SignalWorkflowExecution(gomock.Any(), gomock.Any()).
+		Return(&historyservice.SignalWorkflowExecutionResponse{}, nil).
+		Times(1)
+	d.NoError(d.deploymentClient.SignalVersionReactivation(context.Background(), d.ns, dep, build, 5))
+
+	// Same revision → skip (no mock call expected; gomock fails if called).
+	d.NoError(d.deploymentClient.SignalVersionReactivation(context.Background(), d.ns, dep, build, 5))
+
+	// Lower revision → skip.
+	d.NoError(d.deploymentClient.SignalVersionReactivation(context.Background(), d.ns, dep, build, 3))
+
+	// Higher revision → fires again.
+	d.mockHistoryClient.EXPECT().
+		SignalWorkflowExecution(gomock.Any(), gomock.Any()).
+		Return(&historyservice.SignalWorkflowExecutionResponse{}, nil).
+		Times(1)
+	d.NoError(d.deploymentClient.SignalVersionReactivation(context.Background(), d.ns, dep, build, 7))
+
+	// Same-or-lower after the higher rev → still skipped.
+	d.NoError(d.deploymentClient.SignalVersionReactivation(context.Background(), d.ns, dep, build, 7))
+	d.NoError(d.deploymentClient.SignalVersionReactivation(context.Background(), d.ns, dep, build, 5))
+}
+
+// TestSignalVersionReactivation_DedupIsolatedPerVersion verifies the dedup key includes
+// (namespaceID, deploymentName, buildID) — different version workflows do not share state.
+func (d *deploymentWorkflowClientSuite) TestSignalVersionReactivation_DedupIsolatedPerVersion() {
+	d.mockHistoryClient.EXPECT().
+		SignalWorkflowExecution(gomock.Any(), gomock.Any()).
+		Return(&historyservice.SignalWorkflowExecutionResponse{}, nil).
+		Times(3)
+
+	d.NoError(d.deploymentClient.SignalVersionReactivation(context.Background(), d.ns, "dep-a", "build-1", 5))
+	d.NoError(d.deploymentClient.SignalVersionReactivation(context.Background(), d.ns, "dep-b", "build-1", 5))
+	d.NoError(d.deploymentClient.SignalVersionReactivation(context.Background(), d.ns, "dep-a", "build-2", 5))
+}
+
+// TestSignalVersionReactivation_FailureAllowsRetry verifies that a failed signal does NOT
+// record the revision in the cache — a subsequent call for the same revision retries.
+func (d *deploymentWorkflowClientSuite) TestSignalVersionReactivation_FailureAllowsRetry() {
+	const (
+		dep   = "my-deployment"
+		build = "build-1"
+	)
+
+	// First attempt fails.
+	failErr := serviceerror.NewUnavailable("downstream unavailable")
+	d.mockHistoryClient.EXPECT().
+		SignalWorkflowExecution(gomock.Any(), gomock.Any()).
+		Return(nil, failErr).
+		Times(1)
+	err := d.deploymentClient.SignalVersionReactivation(context.Background(), d.ns, dep, build, 5)
+	d.Error(err)
+
+	// Retry at the same revision must hit the wire again (cache not recorded on failure).
+	d.mockHistoryClient.EXPECT().
+		SignalWorkflowExecution(gomock.Any(), gomock.Any()).
+		Return(&historyservice.SignalWorkflowExecutionResponse{}, nil).
+		Times(1)
+	d.NoError(d.deploymentClient.SignalVersionReactivation(context.Background(), d.ns, dep, build, 5))
+}
diff --git a/tests/worker_deployment_version_test.go b/tests/worker_deployment_version_test.go
index 18fe84df01d..00d9e427614 100644
--- a/tests/worker_deployment_version_test.go
+++ b/tests/worker_deployment_version_test.go
@@ -49,7 +49,6 @@ const (
 	testLongVersionDrainageRefreshInterval       = 10 * time.Second
 	testLongVersionDrainageVisibilityGracePeriod = 10 * time.Second
 	testVersionMembershipCacheTTL                = 5 * time.Second
-	testLongVersionReactivationCacheTTL          = 5 * time.Minute
 	testMaxVersionsInDeployment                  = 4
 )
 
@@ -88,9 +87,6 @@ func (s *DeploymentVersionSuite) SetupSuite() {
 		dynamicconfig.VersionDrainageStatusRefreshInterval.Key():       testVersionDrainageRefreshInterval,
 		dynamicconfig.VersionDrainageStatusVisibilityGracePeriod.Key(): testVersionDrainageVisibilityGracePeriod,
 		dynamicconfig.VersionMembershipCacheTTL.Key():                  testVersionMembershipCacheTTL,
-
-		// Large TTL for deduplication test. Must be set at suite level for cache initialization to work.
-		dynamicconfig.VersionReactivationSignalCacheTTL.Key(): testLongVersionReactivationCacheTTL,
 	}))
 }
 
@@ -2213,36 +2209,24 @@ func (s *DeploymentVersionSuite) TestUpdateWorkflowExecutionOptions_SetPinnedSet
 }
 
 func (s *DeploymentVersionSuite) TestUpdateWorkflowExecutionOptions_ReactivateVersionOnPinned() {
-	s.OverrideDynamicConfig(dynamicconfig.VersionDrainageStatusVisibilityGracePeriod, testLongVersionDrainageVisibilityGracePeriod)
-	s.OverrideDynamicConfig(dynamicconfig.VersionDrainageStatusRefreshInterval, testLongVersionDrainageRefreshInterval)
-
 	ctx, cancel := context.WithTimeout(context.Background(), time.Minute)
 	defer cancel()
 
 	// Use shorter, explicit deployment series names to avoid truncation issues
 	// Include workflow version in deployment name to avoid conflicts in parallel tests
 	deploymentName := fmt.Sprintf("test-reactivate-wfv%d", s.workflowVersion)
-	tv1 := testvars.New(s).WithDeploymentSeries(deploymentName).WithBuildID(deploymentName + "-v1").WithTaskQueue("test-task-queue") // First version (will become DRAINED)
-	tv2 := testvars.New(s).WithDeploymentSeries(deploymentName).WithBuildID(deploymentName + "-v2").WithTaskQueue("test-task-queue") // Second version (will become CURRENT)
+	tv1 := testvars.New(s).WithDeploymentSeries(deploymentName).WithBuildID(deploymentName + "-v1").WithTaskQueue("test-task-queue") // Pinned target (INACTIVE)
+	tv2 := testvars.New(s).WithDeploymentSeries(deploymentName).WithBuildID(deploymentName + "-v2").WithTaskQueue("test-task-queue") // Current version
 
-	// set version 1 as current
+	// v1 starts INACTIVE (never set as current). The reactivation signal handler in
+	// version_workflow.go treats DRAINED and INACTIVE identically — both flip to DRAINING.
 	s.startVersionWorkflow(ctx, tv1)
-	err := s.setCurrent(tv1, true)
-	s.NoError(err)
 
-	// set version 2 as current which shall cause version 1 to be in 'Draining' state
+	// v2 becomes the current version so the initial (non-pinned) workflow has a target.
 	s.startVersionWorkflow(ctx, tv2)
-	err = s.setCurrent(tv2, true)
+	err := s.setCurrent(tv2, true)
 	s.NoError(err)
 
-	// Wait for version 1 to become DRAINED
-	s.checkVersionDrainageAndVersionStatus(ctx, tv1,
-		&deploymentpb.VersionDrainageInfo{
-			Status: enumspb.VERSION_DRAINAGE_STATUS_DRAINED,
-		},
-		enumspb.WORKER_DEPLOYMENT_VERSION_STATUS_DRAINED,
-		testLongVersionDrainageVisibilityGracePeriod+testLongVersionDrainageRefreshInterval) // wait for grace period and refresh interval
-
 	wf := func(version string) func(ctx workflow.Context) (string, error) {
 		return func(ctx workflow.Context) (string, error) {
 			workflow.GetSignalChannel(ctx, "complete").Receive(ctx, nil)
@@ -2250,7 +2234,7 @@ func (s *DeploymentVersionSuite) TestUpdateWorkflowExecutionOptions_ReactivateVe
 		}
 	}
 
-	// Register a worker for version 1 (DRAINED) so it can accept workflows when
+	// Register a worker for version 1 (INACTIVE) so it can accept workflows when
 	// UpdateWorkflowExecutionOptions is called to pin the workflow to version 1.
 	w1 := worker.New(s.SdkClient(), tv1.TaskQueue().String(), worker.Options{
 		DeploymentOptions: worker.DeploymentOptions{
@@ -2289,7 +2273,7 @@ func (s *DeploymentVersionSuite) TestUpdateWorkflowExecutionOptions_ReactivateVe
 	}, "waitingWorkflow")
 	s.NoError(err)
 
-	// Pin the running workflow to version 1 (DRAINED) using UpdateWorkflowExecutionOptions.
+	// Pin the running workflow to version 1 (INACTIVE) using UpdateWorkflowExecutionOptions.
 	pinnedOverride := &workflowpb.VersioningOverride{
 		Override: &workflowpb.VersioningOverride_Pinned{
 			Pinned: &workflowpb.VersioningOverride_PinnedOverride{
@@ -2347,35 +2331,15 @@ func (s *DeploymentVersionSuite) TestUpdateWorkflowExecutionOptions_ReactivateVe
 }
 
 func (s *DeploymentVersionSuite) TestStartWorkflowExecution_ReactivateVersionOnPinned() {
-	s.OverrideDynamicConfig(dynamicconfig.VersionDrainageStatusVisibilityGracePeriod, testLongVersionDrainageVisibilityGracePeriod)
-	s.OverrideDynamicConfig(dynamicconfig.VersionDrainageStatusRefreshInterval, testLongVersionDrainageRefreshInterval)
-
 	ctx, cancel := context.WithTimeout(context.Background(), time.Minute)
 	defer cancel()
 
-	// Use shorter, explicit deployment series names to avoid truncation issues
-	// Include workflow version in deployment name to avoid conflicts in parallel tests
 	deploymentName := fmt.Sprintf("test-start-reactivate-wfv%d", s.workflowVersion)
-	tv1 := testvars.New(s).WithDeploymentSeries(deploymentName).WithBuildID(deploymentName + "-v1").WithTaskQueue("test-start-task-queue") // First version (will become DRAINED)
-	tv2 := testvars.New(s).WithDeploymentSeries(deploymentName).WithBuildID(deploymentName + "-v2").WithTaskQueue("test-start-task-queue") // Second version (will become CURRENT)
+	tv1 := testvars.New(s).WithDeploymentSeries(deploymentName).WithBuildID(deploymentName + "-v1").WithTaskQueue("test-start-task-queue")
 
-	// set version 1 as current
+	// v1 starts INACTIVE (never set as current). The reactivation signal handler in
+	// version_workflow.go treats DRAINED and INACTIVE identically — both flip to DRAINING.
 	s.startVersionWorkflow(ctx, tv1)
-	err := s.setCurrent(tv1, true)
-	s.NoError(err)
-
-	// set version 2 as current which shall cause version 1 to be in 'Draining' state
-	s.startVersionWorkflow(ctx, tv2)
-	err = s.setCurrent(tv2, true)
-	s.NoError(err)
-
-	// Wait for version 1 to become DRAINED
-	s.checkVersionDrainageAndVersionStatus(ctx, tv1,
-		&deploymentpb.VersionDrainageInfo{
-			Status: enumspb.VERSION_DRAINAGE_STATUS_DRAINED,
-		},
-		enumspb.WORKER_DEPLOYMENT_VERSION_STATUS_DRAINED,
-		testLongVersionDrainageVisibilityGracePeriod+testLongVersionDrainageRefreshInterval) // wait for grace period and refresh interval
 
 	wf := func(version string) func(ctx workflow.Context) (string, error) {
 		return func(ctx workflow.Context) (string, error) {
@@ -2384,7 +2348,7 @@ func (s *DeploymentVersionSuite) TestStartWorkflowExecution_ReactivateVersionOnP
 		}
 	}
 
-	// Register a worker for version 1 (DRAINED) so it can accept workflows when
+	// Register a worker for version 1 (INACTIVE) so it can accept workflows when
 	// StartWorkflowExecution is called with a pinned override to version 1.
 	w1 := worker.New(s.SdkClient(), tv1.TaskQueue().String(), worker.Options{
 		DeploymentOptions: worker.DeploymentOptions{
@@ -2399,7 +2363,7 @@ func (s *DeploymentVersionSuite) TestStartWorkflowExecution_ReactivateVersionOnP
 	s.NoError(w1.Start())
 	defer w1.Stop()
 
-	// Start a new workflow with the pinned override pointing to version 1 (DRAINED).
+	// Start a new workflow with the pinned override pointing to version 1 (INACTIVE).
 	wfTV := testvars.New(s)
 	var run sdkclient.WorkflowRun
 	s.Eventually(func() bool {
@@ -2429,7 +2393,7 @@ func (s *DeploymentVersionSuite) TestStartWorkflowExecution_ReactivateVersionOnP
 			},
 		})
 
-	// Wait for version 1 to show up as DRAINING (reactivated from DRAINED)
+	// Wait for version 1 to show up as DRAINING (reactivated from INACTIVE)
 	s.checkVersionDrainageAndVersionStatus(ctx, tv1,
 		&deploymentpb.VersionDrainageInfo{
 			Status: enumspb.VERSION_DRAINAGE_STATUS_DRAINING,
@@ -2451,9 +2415,6 @@ func (s *DeploymentVersionSuite) TestStartWorkflowExecution_ReactivateVersionOnP
 }
 
 func (s *DeploymentVersionSuite) TestStartWorkflowExecution_ReactivateVersionOnPinned_WithConflictPolicy() {
-	s.OverrideDynamicConfig(dynamicconfig.VersionDrainageStatusVisibilityGracePeriod, testLongVersionDrainageVisibilityGracePeriod)
-	s.OverrideDynamicConfig(dynamicconfig.VersionDrainageStatusRefreshInterval, testLongVersionDrainageRefreshInterval)
-
 	ctx, cancel := context.WithTimeout(context.Background(), time.Minute)
 	defer cancel()
 
@@ -2461,24 +2422,15 @@ func (s *DeploymentVersionSuite) TestStartWorkflowExecution_ReactivateVersionOnP
 	tv1 := testvars.New(s).WithDeploymentSeries(deploymentName).WithBuildID(deploymentName + "-v1").WithTaskQueue("test-conflict-task-queue")
 	tv2 := testvars.New(s).WithDeploymentSeries(deploymentName).WithBuildID(deploymentName + "-v2").WithTaskQueue("test-conflict-task-queue")
 
-	// set version 1 as current
+	// v1 starts INACTIVE (never set as current). The reactivation signal handler in
+	// version_workflow.go treats DRAINED and INACTIVE identically — both flip to DRAINING.
 	s.startVersionWorkflow(ctx, tv1)
-	err := s.setCurrent(tv1, true)
-	s.NoError(err)
 
-	// set version 2 as current which shall cause version 1 to be in 'Draining' state
+	// v2 becomes the current version so the initial (non-pinned) workflow has a target.
 	s.startVersionWorkflow(ctx, tv2)
-	err = s.setCurrent(tv2, true)
+	err := s.setCurrent(tv2, true)
 	s.NoError(err)
 
-	// Wait for version 1 to become DRAINED
-	s.checkVersionDrainageAndVersionStatus(ctx, tv1,
-		&deploymentpb.VersionDrainageInfo{
-			Status: enumspb.VERSION_DRAINAGE_STATUS_DRAINED,
-		},
-		enumspb.WORKER_DEPLOYMENT_VERSION_STATUS_DRAINED,
-		testLongVersionDrainageVisibilityGracePeriod+testLongVersionDrainageRefreshInterval)
-
 	wf := func(version string) func(ctx workflow.Context) (string, error) {
 		return func(ctx workflow.Context) (string, error) {
 			workflow.GetSignalChannel(ctx, "complete").Receive(ctx, nil)
@@ -2486,7 +2438,7 @@ func (s *DeploymentVersionSuite) TestStartWorkflowExecution_ReactivateVersionOnP
 		}
 	}
 
-	// Register a worker for version 1 (DRAINED) so it can accept workflows
+	// Register a worker for version 1 (INACTIVE) so it can accept workflows
 	w1 := worker.New(s.SdkClient(), tv1.TaskQueue().String(), worker.Options{
 		DeploymentOptions: worker.DeploymentOptions{
 			Version:       tv1.SDKDeploymentVersion(),
@@ -2524,7 +2476,7 @@ func (s *DeploymentVersionSuite) TestStartWorkflowExecution_ReactivateVersionOnP
 		return startErr == nil
 	}, 10*time.Second, 500*time.Millisecond)
 
-	// Now start a second workflow with the SAME workflow ID, pinned to v1 (DRAINED),
+	// Now start a second workflow with the SAME workflow ID, pinned to v1 (INACTIVE),
 	// using TERMINATE_EXISTING conflict policy. This goes through the handleConflict method in api.go.
 	var run sdkclient.WorkflowRun
 	s.Eventually(func() bool {
@@ -2555,7 +2507,7 @@ func (s *DeploymentVersionSuite) TestStartWorkflowExecution_ReactivateVersionOnP
 			},
 		})
 
-	// Wait for version 1 to show up as DRAINING (reactivated from DRAINED)
+	// Wait for version 1 to show up as DRAINING (reactivated from INACTIVE)
 	s.checkVersionDrainageAndVersionStatus(ctx, tv1,
 		&deploymentpb.VersionDrainageInfo{
 			Status: enumspb.VERSION_DRAINAGE_STATUS_DRAINING,
@@ -2577,35 +2529,15 @@ func (s *DeploymentVersionSuite) TestStartWorkflowExecution_ReactivateVersionOnP
 }
 
 func (s *DeploymentVersionSuite) TestSignalWithStartWorkflowExecution_ReactivateVersionOnPinned() {
-	s.OverrideDynamicConfig(dynamicconfig.VersionDrainageStatusVisibilityGracePeriod, testLongVersionDrainageVisibilityGracePeriod)
-	s.OverrideDynamicConfig(dynamicconfig.VersionDrainageStatusRefreshInterval, testLongVersionDrainageRefreshInterval)
-
 	ctx, cancel := context.WithTimeout(context.Background(), time.Minute)
 	defer cancel()
 
-	// Use shorter, explicit deployment series names to avoid truncation issues
-	// Include workflow version in deployment name to avoid conflicts in parallel tests
 	deploymentName := fmt.Sprintf("test-sws-reactivate-wfv%d", s.workflowVersion)
-	tv1 := testvars.New(s).WithDeploymentSeries(deploymentName).WithBuildID(deploymentName + "-v1").WithTaskQueue("test-sws-task-queue") // First version (will become DRAINED)
-	tv2 := testvars.New(s).WithDeploymentSeries(deploymentName).WithBuildID(deploymentName + "-v2").WithTaskQueue("test-sws-task-queue") // Second version (will become CURRENT)
+	tv1 := testvars.New(s).WithDeploymentSeries(deploymentName).WithBuildID(deploymentName + "-v1").WithTaskQueue("test-sws-task-queue")
 
-	// set version 1 as current
+	// v1 starts INACTIVE (never set as current). The reactivation signal handler in
+	// version_workflow.go treats DRAINED and INACTIVE identically — both flip to DRAINING.
 	s.startVersionWorkflow(ctx, tv1)
-	err := s.setCurrent(tv1, true)
-	s.NoError(err)
-
-	// set version 2 as current which shall cause version 1 to be in 'Draining' state
-	s.startVersionWorkflow(ctx, tv2)
-	err = s.setCurrent(tv2, true)
-	s.NoError(err)
-
-	// Wait for version 1 to become DRAINED
-	s.checkVersionDrainageAndVersionStatus(ctx, tv1,
-		&deploymentpb.VersionDrainageInfo{
-			Status: enumspb.VERSION_DRAINAGE_STATUS_DRAINED,
-		},
-		enumspb.WORKER_DEPLOYMENT_VERSION_STATUS_DRAINED,
-		testLongVersionDrainageVisibilityGracePeriod+testLongVersionDrainageRefreshInterval) // wait for grace period and refresh interval
 
 	wf := func(version string) func(ctx workflow.Context) (string, error) {
 		return func(ctx workflow.Context) (string, error) {
@@ -2614,7 +2546,7 @@ func (s *DeploymentVersionSuite) TestSignalWithStartWorkflowExecution_Reactivate
 		}
 	}
 
-	// Register a worker for version 1 (DRAINED) so it can accept workflows when
+	// Register a worker for version 1 (INACTIVE) so it can accept workflows when
 	// SignalWithStartWorkflowExecution is called with a pinned override to version 1.
 	w1 := worker.New(s.SdkClient(), tv1.TaskQueue().String(), worker.Options{
 		DeploymentOptions: worker.DeploymentOptions{
@@ -2629,7 +2561,7 @@ func (s *DeploymentVersionSuite) TestSignalWithStartWorkflowExecution_Reactivate
 	s.NoError(w1.Start())
 	defer w1.Stop()
 
-	// Use SignalWithStart with the pinned override pointing to version 1 (DRAINED).
+	// Use SignalWithStart with the pinned override pointing to version 1 (INACTIVE).
 	// This should START a new workflow (not signal an existing one) since no workflow exists yet.
 	wfTV := testvars.New(s)
 	var run sdkclient.WorkflowRun
@@ -2665,7 +2597,7 @@ func (s *DeploymentVersionSuite) TestSignalWithStartWorkflowExecution_Reactivate
 			},
 		})
 
-	// Wait for version 1 to show up as DRAINING (reactivated from DRAINED)
+	// Wait for version 1 to show up as DRAINING (reactivated from INACTIVE)
 	s.checkVersionDrainageAndVersionStatus(ctx, tv1,
 		&deploymentpb.VersionDrainageInfo{
 			Status: enumspb.VERSION_DRAINAGE_STATUS_DRAINING,
@@ -2687,36 +2619,24 @@ func (s *DeploymentVersionSuite) TestSignalWithStartWorkflowExecution_Reactivate
 }
 
 func (s *DeploymentVersionSuite) TestResetWorkflowExecution_ReactivateVersionOnPinned() {
-	s.OverrideDynamicConfig(dynamicconfig.VersionDrainageStatusVisibilityGracePeriod, testLongVersionDrainageVisibilityGracePeriod)
-	s.OverrideDynamicConfig(dynamicconfig.VersionDrainageStatusRefreshInterval, testLongVersionDrainageRefreshInterval)
-
 	ctx, cancel := context.WithTimeout(context.Background(), time.Minute)
 	defer cancel()
 
 	// Use shorter, explicit deployment series names to avoid truncation issues
 	// Include workflow version in deployment name to avoid conflicts in parallel tests
 	deploymentName := fmt.Sprintf("test-reset-reactivate-wfv%d", s.workflowVersion)
-	tv1 := testvars.New(s).WithDeploymentSeries(deploymentName).WithBuildID(deploymentName + "-v1").WithTaskQueue("test-reset-task-queue") // First version (will become DRAINED)
-	tv2 := testvars.New(s).WithDeploymentSeries(deploymentName).WithBuildID(deploymentName + "-v2").WithTaskQueue("test-reset-task-queue") // Second version (will become CURRENT)
+	tv1 := testvars.New(s).WithDeploymentSeries(deploymentName).WithBuildID(deploymentName + "-v1").WithTaskQueue("test-reset-task-queue") // Pinned target (INACTIVE)
+	tv2 := testvars.New(s).WithDeploymentSeries(deploymentName).WithBuildID(deploymentName + "-v2").WithTaskQueue("test-reset-task-queue") // Current version
 
-	// set version 1 as current
+	// v1 starts INACTIVE (never set as current). The reactivation signal handler in
+	// version_workflow.go treats DRAINED and INACTIVE identically — both flip to DRAINING.
 	s.startVersionWorkflow(ctx, tv1)
-	err := s.setCurrent(tv1, true)
-	s.NoError(err)
 
-	// set version 2 as current which shall cause version 1 to be in 'Draining' state
+	// v2 becomes the current version so the initial (non-pinned) workflow has a target.
 	s.startVersionWorkflow(ctx, tv2)
-	err = s.setCurrent(tv2, true)
+	err := s.setCurrent(tv2, true)
 	s.NoError(err)
 
-	// Wait for version 1 to become DRAINED
-	s.checkVersionDrainageAndVersionStatus(ctx, tv1,
-		&deploymentpb.VersionDrainageInfo{
-			Status: enumspb.VERSION_DRAINAGE_STATUS_DRAINED,
-		},
-		enumspb.WORKER_DEPLOYMENT_VERSION_STATUS_DRAINED,
-		testLongVersionDrainageVisibilityGracePeriod+testLongVersionDrainageRefreshInterval) // wait for grace period and refresh interval
-
 	// Workflow that waits for a signal, used for both versions.
 	// Returns a string indicating which version completed it.
 	wf := func(version string) func(ctx workflow.Context) (string, error) {
@@ -2726,7 +2646,7 @@ func (s *DeploymentVersionSuite) TestResetWorkflowExecution_ReactivateVersionOnP
 		}
 	}
 
-	// Register a worker for version 1 (DRAINED) so it can accept workflows when
+	// Register a worker for version 1 (INACTIVE) so it can accept workflows when
 	// ResetWorkflowExecution is called with a pinned override to version 1.
 	w1 := worker.New(s.SdkClient(), tv1.TaskQueue().String(), worker.Options{
 		DeploymentOptions: worker.DeploymentOptions{
@@ -2793,7 +2713,7 @@ func (s *DeploymentVersionSuite) TestResetWorkflowExecution_ReactivateVersionOnP
 	}
 	s.Positive(resetEventID, "Should have found a workflow task complete event")
 
-	// Reset the workflow with PostResetOperations containing a versioning override pinned to v1 (which is currently DRAINED)
+	// Reset the workflow with PostResetOperations containing a versioning override pinned to v1 (which is currently INACTIVE)
 	var resetResp *workflowservice.ResetWorkflowExecutionResponse
 	s.Eventually(func() bool {
 		var resetErr error
@@ -2848,7 +2768,7 @@ func (s *DeploymentVersionSuite) TestResetWorkflowExecution_ReactivateVersionOnP
 			},
 		})
 
-	// Wait for version 1 to show up as DRAINING (reactivated from DRAINED)
+	// Wait for version 1 to show up as DRAINING (reactivated from INACTIVE)
 	s.checkVersionDrainageAndVersionStatus(ctx, tv1,
 		&deploymentpb.VersionDrainageInfo{
 			Status: enumspb.VERSION_DRAINAGE_STATUS_DRAINING,
@@ -3158,591 +3078,6 @@ func (s *DeploymentVersionSuite) TestSignalWithStartWorkflowExecution_WithUnpinn
 	s.checkDescribeWorkflowAfterOverride(ctx, wf, override)
 }
 
-// The following tests verify that the version_reactivation_signal_cache works as intended.
-// Setup note: v1 is left INACTIVE (never made current) rather than forced through a full
-// CURRENT → DRAINING → DRAINED transition. The cache and the reactivation-signal handler
-// both treat INACTIVE and DRAINED identically, and this shaves the drainage wait off every
-// test. DRAINED-side coverage lives in the unit test Test_ReactivateVersion_FromDrained.
-func (s *DeploymentVersionSuite) TestReactivationSignalCache_Deduplication_StartWorkflow() {
-	s.OverrideDynamicConfig(dynamicconfig.VersionDrainageStatusVisibilityGracePeriod, testVersionDrainageVisibilityGracePeriod)
-	s.OverrideDynamicConfig(dynamicconfig.VersionDrainageStatusRefreshInterval, testLongVersionDrainageRefreshInterval)
-
-	ctx, cancel := context.WithTimeout(context.Background(), 3*time.Minute)
-	defer cancel()
-
-	// Use shorter, explicit deployment series names to avoid truncation issues
-	deploymentName := fmt.Sprintf("test-cache-dedup-wfv%d", s.workflowVersion)
-	tv1 := testvars.New(s).WithDeploymentSeries(deploymentName).WithBuildID(deploymentName + "-v1").WithTaskQueue("test-cache-dedup-tq")
-
-	s.startVersionWorkflow(ctx, tv1)
-
-	// Workflow that waits for a signal before completing
-	wf := func(ctx workflow.Context) (string, error) {
-		workflow.GetSignalChannel(ctx, "complete").Receive(ctx, nil)
-		return "done", nil
-	}
-
-	// Register worker for version 1
-	w1 := worker.New(s.SdkClient(), tv1.TaskQueue().String(), worker.Options{
-		DeploymentOptions: worker.DeploymentOptions{
-			Version:       tv1.SDKDeploymentVersion(),
-			UseVersioning: true,
-		},
-	})
-	w1.RegisterWorkflowWithOptions(wf, workflow.RegisterOptions{
-		Name:               "waitingWorkflow",
-		VersioningBehavior: workflow.VersioningBehaviorAutoUpgrade,
-	})
-	s.NoError(w1.Start())
-	defer w1.Stop()
-
-	// === First workflow run: Should trigger reactivation signal to be sent (cache miss) ===
-	wfTV1 := testvars.New(s)
-	var run1 sdkclient.WorkflowRun
-	s.Eventually(func() bool {
-		var startErr error
-		run1, startErr = s.SdkClient().ExecuteWorkflow(ctx, sdkclient.StartWorkflowOptions{
-			TaskQueue: tv1.TaskQueue().String(),
-			ID:        wfTV1.WorkflowID(),
-			VersioningOverride: &sdkclient.PinnedVersioningOverride{
-				Version: tv1.SDKDeploymentVersion(),
-			},
-		}, "waitingWorkflow")
-		return startErr == nil
-	}, 10*time.Second, 500*time.Millisecond)
-
-	// Version 1 should transition to DRAINING
-	s.checkVersionDrainageAndVersionStatus(ctx, tv1,
-		&deploymentpb.VersionDrainageInfo{Status: enumspb.VERSION_DRAINAGE_STATUS_DRAINING},
-		enumspb.WORKER_DEPLOYMENT_VERSION_STATUS_DRAINING,
-		0)
-
-	// Signal workflow to complete.
-	s.NoError(s.SdkClient().SignalWorkflow(ctx, wfTV1.WorkflowID(), run1.GetRunID(), "complete", nil))
-
-	// Wait for workflow to complete.
-	var result string
-	s.NoError(run1.Get(ctx, &result))
-
-	// Wait for version 1 to become Drained again
-	s.checkVersionDrainageAndVersionStatus(ctx, tv1,
-		&deploymentpb.VersionDrainageInfo{Status: enumspb.VERSION_DRAINAGE_STATUS_DRAINED},
-		enumspb.WORKER_DEPLOYMENT_VERSION_STATUS_DRAINED,
-		testVersionDrainageVisibilityGracePeriod+testLongVersionDrainageRefreshInterval)
-
-	// === Second workflow run: Should NOT trigger reactivation signal to be sent (cache hit) ===
-	wfTV2 := testvars.New(s)
-	var run2 sdkclient.WorkflowRun
-	s.Eventually(func() bool {
-		var startErr error
-		run2, startErr = s.SdkClient().ExecuteWorkflow(ctx, sdkclient.StartWorkflowOptions{
-			TaskQueue: tv1.TaskQueue().String(),
-			ID:        wfTV2.WorkflowID(),
-			VersioningOverride: &sdkclient.PinnedVersioningOverride{
-				Version: tv1.SDKDeploymentVersion(),
-			},
-		}, "waitingWorkflow")
-		return startErr == nil
-	}, 10*time.Second, 500*time.Millisecond)
-
-	// Verify version stays Drained for several checks (even though there is a workflow running)
-	// Use Eventually with a counter to check multiple times that the reactivation signal was cached
-	drainedCheckCount := 0
-	s.Eventually(func() bool {
-		resp, err := s.describeVersion(tv1)
-		s.NoError(err)
-		s.Equalf(enumspb.VERSION_DRAINAGE_STATUS_DRAINED, resp.GetWorkerDeploymentVersionInfo().GetDrainageInfo().GetStatus(),
-			"Version should remain DRAINED because reactivation signal was cached (check %d)", drainedCheckCount)
-		s.Equalf(enumspb.WORKER_DEPLOYMENT_VERSION_STATUS_DRAINED, resp.GetWorkerDeploymentVersionInfo().GetStatus(),
-			"Version status should remain DRAINED because reactivation signal was cached (check %d)", drainedCheckCount)
-		drainedCheckCount++
-		return drainedCheckCount >= 5
-	}, 10*time.Second, 1*time.Second)
-
-	// Signal the workflow to complete.
-	s.NoError(s.SdkClient().SignalWorkflow(ctx, wfTV2.WorkflowID(), run2.GetRunID(), "complete", nil))
-	s.NoError(run2.Get(ctx, &result))
-}
-
-func (s *DeploymentVersionSuite) TestReactivationSignalCache_Deduplication_SignalWithStart() {
-	s.OverrideDynamicConfig(dynamicconfig.VersionDrainageStatusVisibilityGracePeriod, testVersionDrainageVisibilityGracePeriod)
-	s.OverrideDynamicConfig(dynamicconfig.VersionDrainageStatusRefreshInterval, testLongVersionDrainageRefreshInterval)
-
-	ctx, cancel := context.WithTimeout(context.Background(), 3*time.Minute)
-	defer cancel()
-
-	// Use shorter, explicit deployment series names to avoid truncation issues
-	deploymentName := fmt.Sprintf("test-sws-cache-dedup-wfv%d", s.workflowVersion)
-	tv1 := testvars.New(s).WithDeploymentSeries(deploymentName).WithBuildID(deploymentName + "-v1").WithTaskQueue("test-sws-cache-dedup-tq")
-
-	s.startVersionWorkflow(ctx, tv1)
-
-	// Workflow that waits for a signal before completing
-	wf := func(ctx workflow.Context) (string, error) {
-		workflow.GetSignalChannel(ctx, "complete").Receive(ctx, nil)
-		return "done", nil
-	}
-
-	// Register worker for version 1
-	w1 := worker.New(s.SdkClient(), tv1.TaskQueue().String(), worker.Options{
-		DeploymentOptions: worker.DeploymentOptions{
-			Version:       tv1.SDKDeploymentVersion(),
-			UseVersioning: true,
-		},
-	})
-	w1.RegisterWorkflowWithOptions(wf, workflow.RegisterOptions{
-		Name:               "waitingWorkflow",
-		VersioningBehavior: workflow.VersioningBehaviorAutoUpgrade,
-	})
-	s.NoError(w1.Start())
-	defer w1.Stop()
-
-	// === FIRST SIGNAL WITH START: Should trigger reactivation (cache miss) ===
-	wfTV1 := testvars.New(s)
-	var run1 sdkclient.WorkflowRun
-	s.Eventually(func() bool {
-		var startErr error
-		run1, startErr = s.SdkClient().SignalWithStartWorkflow(ctx,
-			wfTV1.WorkflowID(),
-			"start-signal",
-			nil,
-			sdkclient.StartWorkflowOptions{
-				TaskQueue: tv1.TaskQueue().String(),
-				VersioningOverride: &sdkclient.PinnedVersioningOverride{
-					Version: tv1.SDKDeploymentVersion(),
-				},
-			},
-			"waitingWorkflow",
-		)
-		return startErr == nil
-	}, 10*time.Second, 500*time.Millisecond)
-
-	// Version 1 should transition to DRAINING (reactivated)
-	s.checkVersionDrainageAndVersionStatus(ctx, tv1,
-		&deploymentpb.VersionDrainageInfo{Status: enumspb.VERSION_DRAINAGE_STATUS_DRAINING},
-		enumspb.WORKER_DEPLOYMENT_VERSION_STATUS_DRAINING,
-		0)
-
-	// Signal workflow to complete
-	s.NoError(s.SdkClient().SignalWorkflow(ctx, wfTV1.WorkflowID(), run1.GetRunID(), "complete", nil))
-
-	// Wait for workflow to complete
-	var result string
-	s.NoError(run1.Get(ctx, &result))
-
-	// Wait for version 1 to become DRAINED again (workflow completed)
-	s.checkVersionDrainageAndVersionStatus(ctx, tv1,
-		&deploymentpb.VersionDrainageInfo{Status: enumspb.VERSION_DRAINAGE_STATUS_DRAINED},
-		enumspb.WORKER_DEPLOYMENT_VERSION_STATUS_DRAINED,
-		testVersionDrainageVisibilityGracePeriod+testLongVersionDrainageRefreshInterval)
-
-	// === SECOND SIGNAL WITH START: Should NOT trigger reactivation (cache hit) ===
-	wfTV2 := testvars.New(s)
-	var run2 sdkclient.WorkflowRun
-	s.Eventually(func() bool {
-		var startErr error
-		run2, startErr = s.SdkClient().SignalWithStartWorkflow(ctx,
-			wfTV2.WorkflowID(),
-			"start-signal",
-			nil,
-			sdkclient.StartWorkflowOptions{
-				TaskQueue: tv1.TaskQueue().String(),
-				VersioningOverride: &sdkclient.PinnedVersioningOverride{
-					Version: tv1.SDKDeploymentVersion(),
-				},
-			},
-			"waitingWorkflow",
-		)
-		return startErr == nil
-	}, 10*time.Second, 500*time.Millisecond)
-
-	// Verify version stays DRAINED for several checks (workflow is still running)
-	// Use Eventually with a counter to check multiple times that the signal was cached
-	drainedCheckCount := 0
-	s.Eventually(func() bool {
-		resp, err := s.describeVersion(tv1)
-		s.NoError(err)
-		s.Equal(enumspb.VERSION_DRAINAGE_STATUS_DRAINED, resp.GetWorkerDeploymentVersionInfo().GetDrainageInfo().GetStatus(),
-			"Version should remain DRAINED because reactivation signal was cached")
-		s.Equal(enumspb.WORKER_DEPLOYMENT_VERSION_STATUS_DRAINED, resp.GetWorkerDeploymentVersionInfo().GetStatus(),
-			"Version status should remain DRAINED because reactivation signal was cached")
-		drainedCheckCount++
-		return drainedCheckCount >= 5
-	}, 10*time.Second, 1*time.Second)
-
-	// Signal the workflow to complete
-	s.NoError(s.SdkClient().SignalWorkflow(ctx, wfTV2.WorkflowID(), run2.GetRunID(), "complete", nil))
-	s.NoError(run2.Get(ctx, &result))
-}
-
-func (s *DeploymentVersionSuite) TestReactivationSignalCache_Deduplication_UpdateOptions() {
-	s.OverrideDynamicConfig(dynamicconfig.VersionDrainageStatusVisibilityGracePeriod, testVersionDrainageVisibilityGracePeriod)
-	s.OverrideDynamicConfig(dynamicconfig.VersionDrainageStatusRefreshInterval, testLongVersionDrainageRefreshInterval)
-
-	ctx, cancel := context.WithTimeout(context.Background(), 3*time.Minute)
-	defer cancel()
-
-	// Use shorter, explicit deployment series names to avoid truncation issues
-	deploymentName := fmt.Sprintf("test-opts-cache-dedup-wfv%d", s.workflowVersion)
-	tv1 := testvars.New(s).WithDeploymentSeries(deploymentName).WithBuildID(deploymentName + "-v1").WithTaskQueue("test-opts-cache-dedup-tq")
-	tv2 := testvars.New(s).WithDeploymentSeries(deploymentName).WithBuildID(deploymentName + "-v2").WithTaskQueue("test-opts-cache-dedup-tq")
-
-	s.startVersionWorkflow(ctx, tv1)
-
-	// Set version 2 as current so workflows can start on it before being pinned/updated to v1
-	s.startVersionWorkflow(ctx, tv2)
-	err := s.setCurrent(tv2, true)
-	s.NoError(err)
-
-	// Workflow that waits for a signal before completing
-	wf := func(ctx workflow.Context) (string, error) {
-		workflow.GetSignalChannel(ctx, "complete").Receive(ctx, nil)
-		return "done", nil
-	}
-
-	// Register worker for version 1 (INACTIVE)
-	w1 := worker.New(s.SdkClient(), tv1.TaskQueue().String(), worker.Options{
-		DeploymentOptions: worker.DeploymentOptions{
-			Version:       tv1.SDKDeploymentVersion(),
-			UseVersioning: true,
-		},
-	})
-	w1.RegisterWorkflowWithOptions(wf, workflow.RegisterOptions{
-		Name:               "waitingWorkflow",
-		VersioningBehavior: workflow.VersioningBehaviorAutoUpgrade,
-	})
-	s.NoError(w1.Start())
-	defer w1.Stop()
-
-	// Register worker for version 2 (CURRENT) on the same task queue
-	w2 := worker.New(s.SdkClient(), tv1.TaskQueue().String(), worker.Options{
-		DeploymentOptions: worker.DeploymentOptions{
-			Version:       tv2.SDKDeploymentVersion(),
-			UseVersioning: true,
-		},
-	})
-	w2.RegisterWorkflowWithOptions(wf, workflow.RegisterOptions{
-		Name:               "waitingWorkflow",
-		VersioningBehavior: workflow.VersioningBehaviorAutoUpgrade,
-	})
-	s.NoError(w2.Start())
-	defer w2.Stop()
-
-	s.waitForPollers(ctx, tv1, tv2)
-
-	pinnedOverride := &workflowpb.VersioningOverride{
-		Override: &workflowpb.VersioningOverride_Pinned{
-			Pinned: &workflowpb.VersioningOverride_PinnedOverride{
-				Behavior: workflowpb.VersioningOverride_PINNED_OVERRIDE_BEHAVIOR_PINNED,
-				Version:  tv1.ExternalDeploymentVersion(),
-			},
-		},
-	}
-
-	// === FIRST UPDATE OPTIONS: Should trigger reactivation (cache miss) ===
-	// Start workflow on v2 (current version) - waits for signal to complete
-	wfTV1 := testvars.New(s)
-	run1, err := s.SdkClient().ExecuteWorkflow(ctx, sdkclient.StartWorkflowOptions{
-		TaskQueue: tv1.TaskQueue().String(),
-		ID:        wfTV1.WorkflowID(),
-	}, "waitingWorkflow")
-	s.NoError(err)
-
-	// Pin the workflow to v1 using UpdateWorkflowExecutionOptions
-	s.Eventually(func() bool {
-		_, err = s.FrontendClient().UpdateWorkflowExecutionOptions(ctx,
-			&workflowservice.UpdateWorkflowExecutionOptionsRequest{
-				Namespace: s.Namespace().String(),
-				WorkflowExecution: &commonpb.WorkflowExecution{
-					WorkflowId: wfTV1.WorkflowID(),
-					RunId:      run1.GetRunID(),
-				},
-				WorkflowExecutionOptions: &workflowpb.WorkflowExecutionOptions{
-					VersioningOverride: pinnedOverride,
-				},
-				UpdateMask: &fieldmaskpb.FieldMask{Paths: []string{"versioning_override"}},
-			})
-		return err == nil
-	}, 10*time.Second, 500*time.Millisecond)
-
-	// Signal workflow to complete
-	s.NoError(s.SdkClient().SignalWorkflow(ctx, wfTV1.WorkflowID(), run1.GetRunID(), "complete", nil))
-
-	// Wait for workflow to complete
-	var result string
-	s.NoError(run1.Get(ctx, &result))
-
-	// Version 1 should transition to DRAINING (reactivated)
-	s.checkVersionDrainageAndVersionStatus(ctx, tv1,
-		&deploymentpb.VersionDrainageInfo{Status: enumspb.VERSION_DRAINAGE_STATUS_DRAINING},
-		enumspb.WORKER_DEPLOYMENT_VERSION_STATUS_DRAINING,
-		0)
-
-	// Wait for version 1 to become DRAINED again (workflow completed)
-	s.checkVersionDrainageAndVersionStatus(ctx, tv1,
-		&deploymentpb.VersionDrainageInfo{Status: enumspb.VERSION_DRAINAGE_STATUS_DRAINED},
-		enumspb.WORKER_DEPLOYMENT_VERSION_STATUS_DRAINED,
-		testVersionDrainageVisibilityGracePeriod+testLongVersionDrainageRefreshInterval)
-
-	// === SECOND UPDATE OPTIONS: Should NOT trigger reactivation (cache hit) ===
-	// Start another workflow on v2 - waits for signal to complete
-	wfTV2 := testvars.New(s)
-	run2, err := s.SdkClient().ExecuteWorkflow(ctx, sdkclient.StartWorkflowOptions{
-		TaskQueue: tv1.TaskQueue().String(),
-		ID:        wfTV2.WorkflowID(),
-	}, "waitingWorkflow")
-	s.NoError(err)
-
-	// Pin this workflow to v1 using UpdateWorkflowExecutionOptions (should be cached)
-	s.Eventually(func() bool {
-		_, err = s.FrontendClient().UpdateWorkflowExecutionOptions(ctx,
-			&workflowservice.UpdateWorkflowExecutionOptionsRequest{
-				Namespace: s.Namespace().String(),
-				WorkflowExecution: &commonpb.WorkflowExecution{
-					WorkflowId: wfTV2.WorkflowID(),
-					RunId:      run2.GetRunID(),
-				},
-				WorkflowExecutionOptions: &workflowpb.WorkflowExecutionOptions{
-					VersioningOverride: pinnedOverride,
-				},
-				UpdateMask: &fieldmaskpb.FieldMask{Paths: []string{"versioning_override"}},
-			})
-		return err == nil
-	}, 10*time.Second, 500*time.Millisecond)
-
-	// Verify version stays DRAINED for several checks (workflow is still running)
-	// Use Eventually with a counter to check multiple times that the signal was cached
-	drainedCheckCount := 0
-	s.Eventually(func() bool {
-		resp, err := s.describeVersion(tv1)
-		s.NoError(err)
-		s.Equal(enumspb.VERSION_DRAINAGE_STATUS_DRAINED, resp.GetWorkerDeploymentVersionInfo().GetDrainageInfo().GetStatus(),
-			"Version should remain DRAINED because reactivation signal was cached")
-		s.Equal(enumspb.WORKER_DEPLOYMENT_VERSION_STATUS_DRAINED, resp.GetWorkerDeploymentVersionInfo().GetStatus(),
-			"Version status should remain DRAINED because reactivation signal was cached")
-		drainedCheckCount++
-		return drainedCheckCount >= 5
-	}, 10*time.Second, 1*time.Second)
-
-	// Signal the workflow to complete
-	s.NoError(s.SdkClient().SignalWorkflow(ctx, wfTV2.WorkflowID(), run2.GetRunID(), "complete", nil))
-	s.NoError(run2.Get(ctx, &result))
-}
-
-// TestReactivationSignalCache_Deduplication_Reset verifies that the version reactivation signal cache
-// deduplicates signals when ResetWorkflowExecution is called multiple times with a pinned override
-// to a non-current (INACTIVE or DRAINED) version.
-func (s *DeploymentVersionSuite) TestReactivationSignalCache_Deduplication_Reset() {
-	s.OverrideDynamicConfig(dynamicconfig.VersionDrainageStatusVisibilityGracePeriod, testVersionDrainageVisibilityGracePeriod)
-	s.OverrideDynamicConfig(dynamicconfig.VersionDrainageStatusRefreshInterval, testLongVersionDrainageRefreshInterval)
-
-	ctx, cancel := context.WithTimeout(context.Background(), 3*time.Minute)
-	defer cancel()
-
-	// Use shorter, explicit deployment series names to avoid truncation issues
-	deploymentName := fmt.Sprintf("test-reset-cache-dedup-wfv%d", s.workflowVersion)
-	tv1 := testvars.New(s).WithDeploymentSeries(deploymentName).WithBuildID(deploymentName + "-v1").WithTaskQueue("test-reset-cache-dedup-tq")
-	tv2 := testvars.New(s).WithDeploymentSeries(deploymentName).WithBuildID(deploymentName + "-v2").WithTaskQueue("test-reset-cache-dedup-tq")
-
-	s.startVersionWorkflow(ctx, tv1)
-
-	// Set version 2 as current so workflows can start on it before being reset with a pinned override to v1
-	s.startVersionWorkflow(ctx, tv2)
-	err := s.setCurrent(tv2, true)
-	s.NoError(err)
-
-	// Workflow that waits for a signal before completing
-	wf := func(ctx workflow.Context) (string, error) {
-		workflow.GetSignalChannel(ctx, "complete").Receive(ctx, nil)
-		return "done", nil
-	}
-
-	// Register worker for version 1 (INACTIVE)
-	w1 := worker.New(s.SdkClient(), tv1.TaskQueue().String(), worker.Options{
-		DeploymentOptions: worker.DeploymentOptions{
-			Version:       tv1.SDKDeploymentVersion(),
-			UseVersioning: true,
-		},
-	})
-	w1.RegisterWorkflowWithOptions(wf, workflow.RegisterOptions{
-		Name:               "waitingWorkflow",
-		VersioningBehavior: workflow.VersioningBehaviorAutoUpgrade,
-	})
-	s.NoError(w1.Start())
-	defer w1.Stop()
-
-	// Register worker for version 2 (CURRENT) on the same task queue
-	w2 := worker.New(s.SdkClient(), tv1.TaskQueue().String(), worker.Options{
-		DeploymentOptions: worker.DeploymentOptions{
-			Version:       tv2.SDKDeploymentVersion(),
-			UseVersioning: true,
-		},
-	})
-	w2.RegisterWorkflowWithOptions(wf, workflow.RegisterOptions{
-		Name:               "waitingWorkflow",
-		VersioningBehavior: workflow.VersioningBehaviorAutoUpgrade,
-	})
-	s.NoError(w2.Start())
-	defer w2.Stop()
-
-	s.waitForPollers(ctx, tv1, tv2)
-
-	pinnedOverride := &workflowpb.VersioningOverride{
-		Override: &workflowpb.VersioningOverride_Pinned{
-			Pinned: &workflowpb.VersioningOverride_PinnedOverride{
-				Behavior: workflowpb.VersioningOverride_PINNED_OVERRIDE_BEHAVIOR_PINNED,
-				Version:  tv1.ExternalDeploymentVersion(),
-			},
-		},
-	}
-
-	// Helper function to start a workflow, wait for task completion, and get reset event ID
-	startAndGetResetEventID := func(wfID string) (sdkclient.WorkflowRun, int64) {
-		run, err := s.SdkClient().ExecuteWorkflow(ctx, sdkclient.StartWorkflowOptions{
-			TaskQueue: tv1.TaskQueue().String(),
-			ID:        wfID,
-		}, "waitingWorkflow")
-		s.NoError(err)
-
-		// Wait for workflow task completion (creates a reset point)
-		s.Eventually(func() bool {
-			hist := s.SdkClient().GetWorkflowHistory(ctx, wfID, run.GetRunID(), false, enumspb.HISTORY_EVENT_FILTER_TYPE_ALL_EVENT)
-			for hist.HasNext() {
-				event, err := hist.Next()
-				if err != nil {
-					return false
-				}
-				if event.EventType == enumspb.EVENT_TYPE_WORKFLOW_TASK_COMPLETED {
-					return true
-				}
-			}
-			return false
-		}, 10*time.Second, 200*time.Millisecond)
-
-		// Find the reset event ID
-		var resetEventID int64
-		hist := s.SdkClient().GetWorkflowHistory(ctx, wfID, run.GetRunID(), false, enumspb.HISTORY_EVENT_FILTER_TYPE_ALL_EVENT)
-		for hist.HasNext() {
-			event, err := hist.Next()
-			s.NoError(err)
-			if event.EventType == enumspb.EVENT_TYPE_WORKFLOW_TASK_COMPLETED {
-				resetEventID = event.EventId
-				break
-			}
-		}
-		s.Positive(resetEventID)
-		return run, resetEventID
-	}
-
-	// === FIRST RESET: Should trigger reactivation (cache miss) ===
-	wfTV1 := testvars.New(s)
-	run1, resetEventID1 := startAndGetResetEventID(wfTV1.WorkflowID())
-
-	// Reset with pinned override to v1 (DRAINED)
-	var resetResp1 *workflowservice.ResetWorkflowExecutionResponse
-	s.Eventually(func() bool {
-		var resetErr error
-		resetResp1, resetErr = s.FrontendClient().ResetWorkflowExecution(ctx, &workflowservice.ResetWorkflowExecutionRequest{
-			Namespace: s.Namespace().String(),
-			WorkflowExecution: &commonpb.WorkflowExecution{
-				WorkflowId: wfTV1.WorkflowID(),
-				RunId:      run1.GetRunID(),
-			},
-			Reason:                    "testing-reset-cache-dedup-1",
-			RequestId:                 uuid.NewString(),
-			WorkflowTaskFinishEventId: resetEventID1,
-			PostResetOperations: []*workflowpb.PostResetOperation{
-				{
-					Variant: &workflowpb.PostResetOperation_UpdateWorkflowOptions_{
-						UpdateWorkflowOptions: &workflowpb.PostResetOperation_UpdateWorkflowOptions{
-							WorkflowExecutionOptions: &workflowpb.WorkflowExecutionOptions{
-								VersioningOverride: pinnedOverride,
-							},
-							UpdateMask: &fieldmaskpb.FieldMask{Paths: []string{"versioning_override"}},
-						},
-					},
-				},
-			},
-		})
-		return resetErr == nil
-	}, 10*time.Second, 500*time.Millisecond)
-
-	// Signal the reset workflow to complete
-	s.NoError(s.SdkClient().SignalWorkflow(ctx, wfTV1.WorkflowID(), resetResp1.RunId, "complete", nil))
-
-	// Wait for workflow to complete
-	resetRun1 := s.SdkClient().GetWorkflow(ctx, wfTV1.WorkflowID(), resetResp1.RunId)
-	var result string
-	s.NoError(resetRun1.Get(ctx, &result))
-
-	// Version 1 should transition to DRAINING (reactivated)
-	s.checkVersionDrainageAndVersionStatus(ctx, tv1,
-		&deploymentpb.VersionDrainageInfo{Status: enumspb.VERSION_DRAINAGE_STATUS_DRAINING},
-		enumspb.WORKER_DEPLOYMENT_VERSION_STATUS_DRAINING,
-		0)
-
-	// Wait for version 1 to become DRAINED again (workflow completed)
-	s.checkVersionDrainageAndVersionStatus(ctx, tv1,
-		&deploymentpb.VersionDrainageInfo{Status: enumspb.VERSION_DRAINAGE_STATUS_DRAINED},
-		enumspb.WORKER_DEPLOYMENT_VERSION_STATUS_DRAINED,
-		testVersionDrainageVisibilityGracePeriod+testLongVersionDrainageRefreshInterval)
-
-	// === SECOND RESET: Should NOT trigger reactivation (cache hit) ===
-	wfTV2 := testvars.New(s)
-	run2, resetEventID2 := startAndGetResetEventID(wfTV2.WorkflowID())
-
-	// Reset with pinned override to v1 (should be cached)
-	var resetResp2 *workflowservice.ResetWorkflowExecutionResponse
-	s.Eventually(func() bool {
-		var resetErr error
-		resetResp2, resetErr = s.FrontendClient().ResetWorkflowExecution(ctx, &workflowservice.ResetWorkflowExecutionRequest{
-			Namespace: s.Namespace().String(),
-			WorkflowExecution: &commonpb.WorkflowExecution{
-				WorkflowId: wfTV2.WorkflowID(),
-				RunId:      run2.GetRunID(),
-			},
-			Reason:                    "testing-reset-cache-dedup-2",
-			RequestId:                 uuid.NewString(),
-			WorkflowTaskFinishEventId: resetEventID2,
-			PostResetOperations: []*workflowpb.PostResetOperation{
-				{
-					Variant: &workflowpb.PostResetOperation_UpdateWorkflowOptions_{
-						UpdateWorkflowOptions: &workflowpb.PostResetOperation_UpdateWorkflowOptions{
-							WorkflowExecutionOptions: &workflowpb.WorkflowExecutionOptions{
-								VersioningOverride: pinnedOverride,
-							},
-							UpdateMask: &fieldmaskpb.FieldMask{Paths: []string{"versioning_override"}},
-						},
-					},
-				},
-			},
-		})
-		return resetErr == nil
-	}, 10*time.Second, 500*time.Millisecond)
-
-	// Verify version stays DRAINED for several checks (reset workflow is still running)
-	// Use Eventually with a counter to check multiple times that the signal was cached
-	drainedCheckCount := 0
-	s.Eventually(func() bool {
-		resp, err := s.describeVersion(tv1)
-		s.NoError(err)
-		s.Equal(enumspb.VERSION_DRAINAGE_STATUS_DRAINED, resp.GetWorkerDeploymentVersionInfo().GetDrainageInfo().GetStatus(),
-			"Version should remain DRAINED because reactivation signal was cached")
-		s.Equal(enumspb.WORKER_DEPLOYMENT_VERSION_STATUS_DRAINED, resp.GetWorkerDeploymentVersionInfo().GetStatus(),
-			"Version status should remain DRAINED because reactivation signal was cached")
-		drainedCheckCount++
-		return drainedCheckCount >= 5
-	}, 10*time.Second, 1*time.Second)
-
-	// Signal the reset workflow to complete
-	s.NoError(s.SdkClient().SignalWorkflow(ctx, wfTV2.WorkflowID(), resetResp2.RunId, "complete", nil))
-
-	// Wait for workflow to complete
-	resetRun2 := s.SdkClient().GetWorkflow(ctx, wfTV2.WorkflowID(), resetResp2.RunId)
-	var result2 string
-	s.NoError(resetRun2.Get(ctx, &result2))
-}
-
 func (s *DeploymentVersionSuite) TestDeleteVersion_ThenRecreateByPolling() {
 	s.skipBeforeVersion(workerdeployment.VersionDataRevisionNumber)
 	s.OverrideDynamicConfig(dynamicconfig.PollerHistoryTTL, 500*time.Millisecond)