Orphaned Activity Filters Primaver P6R8 using weblogic interface

I have changed some filters from "avaliable to all users" to "avaliable to a list of 4 users" during the reassignment of rights the software no will not let anyone change, delete the filters. These filters are in the Activity area. How do I regain rights to these filters to delete them as ADMIN. I can copy them and use them correctly with all user assignments working as normal or expected now. But I cannot delete the old filters. I need to find out how to reset the user permissions on these certian filters. I have attached a picture.