diff --git a/pkg/cloudcommon/db/namevalidator.go b/pkg/cloudcommon/db/namevalidator.go
index 8793226d2c..6ebb6ac9f9 100644
--- a/pkg/cloudcommon/db/namevalidator.go
+++ b/pkg/cloudcommon/db/namevalidator.go
@@ -80,6 +80,10 @@ func alterNameValidator(model IModel, name string) error {
 }
 
 func GenerateName(manager IModelManager, ownerId mcclient.IIdentityProvider, hint string) (string, error) {
+	return GenerateName2(manager, ownerId, hint, nil)
+}
+
+func GenerateName2(manager IModelManager, ownerId mcclient.IIdentityProvider, hint string, model IModel) (string, error) {
 	_, pattern, patternLen := stringutils.ParseNamePattern(hint)
 	var name string
 	idx := 1
@@ -90,7 +94,13 @@ func GenerateName(manager IModelManager, ownerId mcclient.IIdentityProvider, hin
 		idx += 1
 	}
 	for {
-		uniq, err := isNameUnique(manager, ownerId, name)
+		var uniq bool
+		var err error
+		if model == nil {
+			uniq, err = isNameUnique(manager, ownerId, name)
+		} else {
+			uniq, err = isAlterNameUnique(model, name)
+		}
 		if err != nil {
 			return "", err
 		}
diff --git a/pkg/keystone/driver/ldap/sync.go b/pkg/keystone/driver/ldap/sync.go
index 5517e67681..46b577ba98 100644
--- a/pkg/keystone/driver/ldap/sync.go
+++ b/pkg/keystone/driver/ldap/sync.go
@@ -174,7 +174,7 @@ func (self *SLDAPDriver) syncDomainInfo(ctx context.Context, info SDomainInfo) (
 	if err == nil {
 		if domain.Name != info.Name {
 			// sync domain name
-			newName, err := db.GenerateName(models.DomainManager, nil, info.Name)
+			newName, err := db.GenerateName2(models.DomainManager, nil, info.Name, domain)
 			if err != nil {
 				log.Errorf("sync existing domain name (%s=%s) generate fail %s", domain.Name, info.Name, err)
 			} else {