diff --git a/common/namespace/attrValidator.go b/common/namespace/attrValidator.go
index d6638260168..316b48a62cc 100644
--- a/common/namespace/attrValidator.go
+++ b/common/namespace/attrValidator.go
@@ -118,32 +118,6 @@ func (d *AttrValidatorImpl) validateNamespaceReplicationConfigForGlobalNamespace
 	return nil
 }
 
-func (d *AttrValidatorImpl) validateNamespaceReplicationConfigClustersDoesNotRemove(
-	clustersOld []string,
-	clustersNew []string,
-) error {
-
-	clusterNamesOld := make(map[string]bool)
-	for _, clusterName := range clustersOld {
-		clusterNamesOld[clusterName] = true
-	}
-	clusterNamesNew := make(map[string]bool)
-	for _, clusterName := range clustersNew {
-		clusterNamesNew[clusterName] = true
-	}
-
-	if len(clusterNamesNew) < len(clusterNamesOld) {
-		return errCannotRemoveClustersFromNamespace
-	}
-
-	for clusterName := range clusterNamesOld {
-		if _, ok := clusterNamesNew[clusterName]; !ok {
-			return errCannotRemoveClustersFromNamespace
-		}
-	}
-	return nil
-}
-
 func (d *AttrValidatorImpl) validateClusterName(
 	clusterName string,
 ) error {
diff --git a/common/namespace/attrValidator_test.go b/common/namespace/attrValidator_test.go
index b22e8a8a1cf..76ab43686f8 100644
--- a/common/namespace/attrValidator_test.go
+++ b/common/namespace/attrValidator_test.go
@@ -184,49 +184,3 @@ func (s *attrValidatorSuite) TestValidateNamespaceReplicationConfigForGlobalName
 	)
 	s.NoError(err)
 }
-
-func (s *attrValidatorSuite) TestValidateNamespaceReplicationConfigClustersDoesNotRemove() {
-	err := s.validator.validateNamespaceReplicationConfigClustersDoesNotRemove(
-		[]string{
-			cluster.TestCurrentClusterName,
-			cluster.TestAlternativeClusterName,
-		},
-		[]string{
-			cluster.TestCurrentClusterName,
-			cluster.TestAlternativeClusterName,
-		},
-	)
-	s.NoError(err)
-
-	err = s.validator.validateNamespaceReplicationConfigClustersDoesNotRemove(
-		[]string{
-			cluster.TestCurrentClusterName,
-		},
-		[]string{
-			cluster.TestCurrentClusterName,
-			cluster.TestAlternativeClusterName,
-		},
-	)
-	s.NoError(err)
-
-	err = s.validator.validateNamespaceReplicationConfigClustersDoesNotRemove(
-		[]string{
-			cluster.TestCurrentClusterName,
-			cluster.TestAlternativeClusterName,
-		},
-		[]string{
-			cluster.TestAlternativeClusterName,
-		},
-	)
-	s.IsType(&serviceerror.InvalidArgument{}, err)
-
-	err = s.validator.validateNamespaceReplicationConfigClustersDoesNotRemove(
-		[]string{
-			cluster.TestCurrentClusterName,
-		},
-		[]string{
-			cluster.TestAlternativeClusterName,
-		},
-	)
-	s.IsType(&serviceerror.InvalidArgument{}, err)
-}
diff --git a/common/namespace/handler.go b/common/namespace/handler.go
index 1cf7d30ab20..696e64b5edc 100644
--- a/common/namespace/handler.go
+++ b/common/namespace/handler.go
@@ -501,13 +501,6 @@ func (d *HandlerImpl) UpdateNamespace(
 			for _, clusterConfig := range updateReplicationConfig.Clusters {
 				clustersNew = append(clustersNew, clusterConfig.GetClusterName())
 			}
-
-			if err := d.namespaceAttrValidator.validateNamespaceReplicationConfigClustersDoesNotRemove(
-				replicationConfig.Clusters,
-				clustersNew,
-			); err != nil {
-				return nil, err
-			}
 			replicationConfig.Clusters = clustersNew
 		}
 		if updateReplicationConfig.State != enumspb.REPLICATION_STATE_UNSPECIFIED &&