permissions: flush all users permissions when creating a new user group.

- fixes  #5664

rhodecode/apps/admin/views/user_groups.py

@@ -247,8 +247,7 b' class AdminUserGroupsView(BaseAppView, D'
                     % user_group_name, category='error')
             raise HTTPFound(h.route_path('user_groups_new'))
 
-        affected_user_ids = [self._rhodecode_user.user_id]
-        PermissionModel().trigger_permission_flush(affected_user_ids)
+        PermissionModel().trigger_permission_flush()
 
         raise HTTPFound(
             h.route_path('edit_user_group', user_group_id=user_group_id))