diff --git a/.release-please-manifest.json b/.release-please-manifest.json
index 2dfb0bae0966..34ef045e3fef 100644
--- a/.release-please-manifest.json
+++ b/.release-please-manifest.json
@@ -21,7 +21,7 @@
   "google-analytics-data-v1beta+FILLER": "0.0.0",
   "google-apps-chat": "1.2.0",
   "google-apps-chat+FILLER": "0.0.0",
-  "google-apps-chat-v1": "0.22.0",
+  "google-apps-chat-v1": "0.21.0",
   "google-apps-chat-v1+FILLER": "0.0.0",
   "google-apps-events-subscriptions": "1.2.0",
   "google-apps-events-subscriptions+FILLER": "0.0.0",
@@ -393,7 +393,7 @@
   "google-cloud-errors+FILLER": "0.0.0",
   "google-cloud-essential_contacts": "1.6.0",
   "google-cloud-essential_contacts+FILLER": "0.0.0",
-  "google-cloud-essential_contacts-v1": "1.6.0",
+  "google-cloud-essential_contacts-v1": "1.6.1",
   "google-cloud-essential_contacts-v1+FILLER": "0.0.0",
   "google-cloud-eventarc": "2.1.0",
   "google-cloud-eventarc+FILLER": "0.0.0",
@@ -401,11 +401,11 @@
   "google-cloud-eventarc-publishing+FILLER": "0.0.0",
   "google-cloud-eventarc-publishing-v1": "1.7.0",
   "google-cloud-eventarc-publishing-v1+FILLER": "0.0.0",
-  "google-cloud-eventarc-v1": "2.7.1",
+  "google-cloud-eventarc-v1": "2.7.0",
   "google-cloud-eventarc-v1+FILLER": "0.0.0",
   "google-cloud-filestore": "2.1.0",
   "google-cloud-filestore+FILLER": "0.0.0",
-  "google-cloud-filestore-v1": "2.6.1",
+  "google-cloud-filestore-v1": "2.6.0",
   "google-cloud-filestore-v1+FILLER": "0.0.0",
   "google-cloud-financial_services": "0.2.0",
   "google-cloud-financial_services+FILLER": "0.0.0",
@@ -421,9 +421,9 @@
   "google-cloud-firestore-v1+FILLER": "0.0.0",
   "google-cloud-functions": "2.1.0",
   "google-cloud-functions+FILLER": "0.0.0",
-  "google-cloud-functions-v1": "2.5.1",
+  "google-cloud-functions-v1": "2.5.0",
   "google-cloud-functions-v1+FILLER": "0.0.0",
-  "google-cloud-functions-v2": "1.5.1",
+  "google-cloud-functions-v2": "1.5.0",
   "google-cloud-functions-v2+FILLER": "0.0.0",
   "google-cloud-gdc_hardware_management": "0.3.0",
   "google-cloud-gdc_hardware_management+FILLER": "0.0.0",
@@ -467,7 +467,7 @@
   "google-cloud-hypercompute_cluster-v1beta+FILLER": "0.0.0",
   "google-cloud-iap": "1.6.0",
   "google-cloud-iap+FILLER": "0.0.0",
-  "google-cloud-iap-v1": "1.7.1",
+  "google-cloud-iap-v1": "1.7.0",
   "google-cloud-iap-v1+FILLER": "0.0.0",
   "google-cloud-ids": "2.1.0",
   "google-cloud-ids+FILLER": "0.0.0",
@@ -757,7 +757,7 @@
   "google-cloud-service_directory+FILLER": "0.0.0",
   "google-cloud-service_directory-v1": "1.6.0",
   "google-cloud-service_directory-v1+FILLER": "0.0.0",
-  "google-cloud-service_directory-v1beta1": "0.21.1",
+  "google-cloud-service_directory-v1beta1": "0.21.0",
   "google-cloud-service_directory-v1beta1+FILLER": "0.0.0",
   "google-cloud-service_health": "2.1.0",
   "google-cloud-service_health+FILLER": "0.0.0",
diff --git a/google-cloud-essential_contacts-v1/CHANGELOG.md b/google-cloud-essential_contacts-v1/CHANGELOG.md
index 6223ba9dd46a..3f5955e7fcb7 100644
--- a/google-cloud-essential_contacts-v1/CHANGELOG.md
+++ b/google-cloud-essential_contacts-v1/CHANGELOG.md
@@ -1,5 +1,11 @@
 # Changelog
 
+### 1.6.1 (2026-04-03)
+
+#### Documentation
+
+* update SelectiveGapicGeneration usage doc ([#33478](https://github.com/googleapis/google-cloud-ruby/issues/33478)) 
+
 ### 1.6.0 (2026-04-02)
 
 #### Features
diff --git a/google-cloud-essential_contacts-v1/lib/google/cloud/essential_contacts/v1/version.rb b/google-cloud-essential_contacts-v1/lib/google/cloud/essential_contacts/v1/version.rb
index 3b061d6f495e..c588281bd86d 100644
--- a/google-cloud-essential_contacts-v1/lib/google/cloud/essential_contacts/v1/version.rb
+++ b/google-cloud-essential_contacts-v1/lib/google/cloud/essential_contacts/v1/version.rb
@@ -21,7 +21,7 @@ module Google
   module Cloud
     module EssentialContacts
       module V1
-        VERSION = "1.6.0"
+        VERSION = "1.6.1"
       end
     end
   end
diff --git a/google-cloud-essential_contacts-v1/snippets/snippet_metadata_google.cloud.essentialcontacts.v1.json b/google-cloud-essential_contacts-v1/snippets/snippet_metadata_google.cloud.essentialcontacts.v1.json
index 9778dbd27a26..ef4cc00859bf 100644
--- a/google-cloud-essential_contacts-v1/snippets/snippet_metadata_google.cloud.essentialcontacts.v1.json
+++ b/google-cloud-essential_contacts-v1/snippets/snippet_metadata_google.cloud.essentialcontacts.v1.json
@@ -1,7 +1,7 @@
 {
   "client_library": {
     "name": "google-cloud-essential_contacts-v1",
-    "version": "1.6.0",
+    "version": "1.6.1",
     "language": "RUBY",
     "apis": [
       {