Since the new version AS2021 it is now possible to change bolts into holes and back. BUT........
If you have a M12 bolt and you change it into a hole, all is fine. But if you want to go back to a bolt it changes to a default M16 bolt. This is wrong. Somehow it should know it;s original bolt size to change back to. Now if you think it's okay and leave it you have the wrong size bolts and drilled holes.