Update clean metadata file with 182989

Author: Microsoft Graph DevX Tooling

clean_v10_metadata/cleanMetadata.xml

@@ -11308,7 +11308,15 @@
         <NavigationProperty Name="oneDriveForBusinessProtectionPolicies" Type="Collection(graph.oneDriveForBusinessProtectionPolicy)" ContainsTarget="true" />
         <NavigationProperty Name="oneDriveForBusinessRestoreSessions" Type="Collection(graph.oneDriveForBusinessRestoreSession)" ContainsTarget="true" />
         <NavigationProperty Name="protectionPolicies" Type="Collection(graph.protectionPolicyBase)" ContainsTarget="true" />
-        <NavigationProperty Name="protectionUnits" Type="Collection(graph.protectionUnitBase)" />
+        <NavigationProperty Name="protectionUnits" Type="Collection(graph.protectionUnitBase)">
+          <Annotation Term="Org.OData.Validation.V1.DerivedTypeConstraint" xmlns:edm="http://docs.oasis-open.org/odata/ns/edm">
+            <Collection>
+              <String>microsoft.graph.siteProtectionUnit</String>
+              <String>microsoft.graph.mailboxProtectionUnit</String>
+              <String>microsoft.graph.driveProtectionUnit</String>
+            </Collection>
+          </Annotation>
+        </NavigationProperty>
         <NavigationProperty Name="restorePoints" Type="Collection(graph.restorePoint)" ContainsTarget="true" />
         <NavigationProperty Name="restoreSessions" Type="Collection(graph.restoreSessionBase)" ContainsTarget="true" />
         <NavigationProperty Name="serviceApps" Type="Collection(graph.serviceApp)" ContainsTarget="true" />