Agreed get the tab out of the way.
Not sure what you have for tools but a few things to try on the cheap would be to use a dremel and carbide cutter to grind in some new flats, cut a slot and try a hand held impact driver, hammer on an old socket or drill just the head off and leave the stud to work with later.
Best of luck
Not sure what you have for tools but a few things to try on the cheap would be to use a dremel and carbide cutter to grind in some new flats, cut a slot and try a hand held impact driver, hammer on an old socket or drill just the head off and leave the stud to work with later.
Best of luck