How to delete group sub folders in the security folder?

In order to do this you'll need to grab the folder id of group sub folder you made (right click it > manage > get folder ID) and run a database query using either the query editor (right click a designer folder > other > query editor) or SQL management software like SMSS. Please take a back up before attempting this, as it's always safe to when running queries that delete data. You query should look like this: UPDATE entity_folder SET deleted = 1 WHERE folder_id = 'your folder ID' After running the query, restart services and the folder will be deleted.