We're excited to announce that we've fully migrated the Xbox Forums to their new home, here on the Microsoft Community forums!
As of today, going to forums.xbox.com will redirect you here to the Xbox area of the Community forums. We've moved all of your existing threads over so you can continue and start conversations with the new forums experience.
We sincerely appreciate the feedback you have provided over this transition and can't wait for you to check out the new Xbox Forums!
Hey there, so does the old account have an email address and password as well as being connected to Xbox Live or is it a local profile only stored on the console?
If it was a Xbox Live profile you will be able to delete the corrupt version from the console and then re-download it, just be aware that it will be the last version of the profile when it was connect to Xbox Live, any progress while playing offline will
If the account was a local profile I don't think there's much you can do, unless you have a copy backed up on a USB.