Moving titles from child companies to the main company shouldn't vacate the title and same with moving them back to the child company it should move the roster member down on a loan deal if needed. This would make it much easier to do things like real life such as moving the ROH and NXT titles to the main company to defend them like WWE, AEW, and many companies do in real life. I don't know if this would be possible but I think it would be a good feature to add to a future update.