Borked Guitar Music

[Moryrie]

Whenever you transfer a sim who has learned different guitar songs to a new hood, they songs duplicate themselves.. (this isn't new..) to fix that, I used 'dropskill' on the guitar skill... had my sim relearn it... and now she can't learn any of the sheet music other than the only one she hadn't learned in her old hood. The other songs appear as unlearned... but she can't re-learn them. There's no interactions for the skill books. Is there a way to fix this?