How to change a "Self" credit into "Actor" section?

I'm trying to help someone whose voice acting credit is somehow appearing on their page as a "Self" credit. I tried deleting the "voice" attribute on the credit in hopes that it would move categories on its own without luck. I've tried deleting the credit completely so I can then re-add it, which has been rejected as unverified despite providing an explanation. If the credit has a character name, why is it not defaulting as an Acting credit? Any ideas on how to make this credit stop appearing as a Self credit?