diff --git a/modules/identity/src/Volo.Abp.Identity.Domain/Volo/Abp/Identity/OrganizationUnitManager.cs b/modules/identity/src/Volo.Abp.Identity.Domain/Volo/Abp/Identity/OrganizationUnitManager.cs
index 778bde3802..9db3ff4581 100644
--- a/modules/identity/src/Volo.Abp.Identity.Domain/Volo/Abp/Identity/OrganizationUnitManager.cs
+++ b/modules/identity/src/Volo.Abp.Identity.Domain/Volo/Abp/Identity/OrganizationUnitManager.cs
@@ -131,7 +131,7 @@ namespace Volo.Abp.Identity
 
             if (siblings.Any(ou => ou.DisplayName == organizationUnit.DisplayName))
             {
-                throw new UserFriendlyException(Localizer["OrganizationUnitDuplicateDisplayNameWarning", organizationUnit.DisplayName]);
+                throw new UserFriendlyException(Localizer["Identity.OrganizationUnit.DuplicateDisplayNameWarning", organizationUnit.DisplayName]);
             }
         }