diff --git a/google/cloud/securitycentermanagement/v1/security_center_management.proto b/google/cloud/securitycentermanagement/v1/security_center_management.proto
index 64dfbd619cdfe..8522d5bef4c9e 100644
--- a/google/cloud/securitycentermanagement/v1/security_center_management.proto
+++ b/google/cloud/securitycentermanagement/v1/security_center_management.proto
@@ -427,14 +427,14 @@ message EffectiveSecurityHealthAnalyticsCustomModule {
     DISABLED = 2;
   }
 
-  // Output only. The resource name of the custom module.
+  // Identifier. The resource name of the custom module.
   // Its format is
   // "organizations/{organization}/locations/{location}/effectiveSecurityHealthAnalyticsCustomModules/{effective_security_health_analytics_custom_module}",
   // or
   // "folders/{folder}/locations/{location}/effectiveSecurityHealthAnalyticsCustomModules/{effective_security_health_analytics_custom_module}",
   // or
   // "projects/{project}/locations/{location}/effectiveSecurityHealthAnalyticsCustomModules/{effective_security_health_analytics_custom_module}"
-  string name = 1 [(google.api.field_behavior) = OUTPUT_ONLY];
+  string name = 1 [(google.api.field_behavior) = IDENTIFIER];
 
   // Output only. The user-specified configuration for the module.
   CustomConfig custom_config = 2 [(google.api.field_behavior) = OUTPUT_ONLY];
@@ -535,7 +535,7 @@ message SecurityHealthAnalyticsCustomModule {
     INHERITED = 3;
   }
 
-  // Immutable. The resource name of the custom module.
+  // Identifier. The resource name of the custom module.
   // Its format is
   // "organizations/{organization}/locations/{location}/securityHealthAnalyticsCustomModules/{security_health_analytics_custom_module}",
   // or
@@ -545,7 +545,7 @@ message SecurityHealthAnalyticsCustomModule {
   //
   // The id {customModule} is server-generated and is not user settable.
   // It will be a numeric id containing 1-20 digits.
-  string name = 1 [(google.api.field_behavior) = IMMUTABLE];
+  string name = 1 [(google.api.field_behavior) = IDENTIFIER];
 
   // Optional. The display name of the Security Health Analytics custom module.
   // This display name becomes the finding category for all findings that are
@@ -1065,14 +1065,14 @@ message EffectiveEventThreatDetectionCustomModule {
     DISABLED = 2;
   }
 
-  // Immutable. The resource name of the ETD custom module.
+  // Identifier. The resource name of the ETD custom module.
   //
   // Its format is:
   //
   //   * "organizations/{organization}/locations/{location}/effectiveEventThreatDetectionCustomModules/{effective_event_threat_detection_custom_module}".
   //   * "folders/{folder}/locations/{location}/effectiveEventThreatDetectionCustomModules/{effective_event_threat_detection_custom_module}".
   //   * "projects/{project}/locations/{location}/effectiveEventThreatDetectionCustomModules/{effective_event_threat_detection_custom_module}".
-  string name = 1 [(google.api.field_behavior) = IMMUTABLE];
+  string name = 1 [(google.api.field_behavior) = IDENTIFIER];
 
   // Output only. Config for the effective module.
   google.protobuf.Struct config = 2 [(google.api.field_behavior) = OUTPUT_ONLY];
@@ -1175,14 +1175,14 @@ message EventThreatDetectionCustomModule {
     INHERITED = 3;
   }
 
-  // Immutable. The resource name of the ETD custom module.
+  // Identifier. The resource name of the ETD custom module.
   //
   // Its format is:
   //
   //   * "organizations/{organization}/locations/{location}/eventThreatDetectionCustomModules/{event_threat_detection_custom_module}".
   //   * "folders/{folder}/locations/{location}/eventThreatDetectionCustomModules/{event_threat_detection_custom_module}".
   //   * "projects/{project}/locations/{location}/eventThreatDetectionCustomModules/{event_threat_detection_custom_module}".
-  string name = 1 [(google.api.field_behavior) = IMMUTABLE];
+  string name = 1 [(google.api.field_behavior) = IDENTIFIER];
 
   // Optional. Config for the module. For the resident module, its config value
   // is defined at this level. For the inherited module, its config value is