[PL-Doc] UG Hierarchical - Breaking changes

docs/platform/role-based-access-control/add-user-groups.md

@@ -78,6 +78,12 @@ At the organization and project scopes, you can quickly create groups by inherit
 | Edit roles and resource groups | You can change the roles and resource groups that were assigned at the current scope only. You can't make cross-scope modifications.<br/><ul><li>Original scope: Manage role and resource group assignments for the original scope only. Can't edit role/resource groups for inherited scopes.</li><li>Inherited scope: Manage role and resource group assignments for the inherited scope only. Can't edit higher-level roles/resource groups or roles/resource groups in other inherited scopes.</li></ul> |
 | Delete group | Original scope only. If deleted, the group is also removed from all scopes where it was inherited. |
 
+:::note
+
+When a user group is inherited from the account scope to a project scope, the system automatically assigns the Organization Viewer role to that user group for the organization containing the project. The role assignment is also recorded in the Audit Logs.
+
+If this role assignment is removed, the user group may lose access to the Organization.
+:::
 To inherit user groups in Harness, you need the following [permissions](./permissions-reference.md):
 
 * **View** user groups at the original scope. For example, if the group originates from the account scope, you must have the ability to view user groups at the account scope.