I have transfered an app on Appstore to a new account. When I update the app, I get a warning telling me the app id has changed. My new bundle prefix (which is associated to my new account) differs from thre prefix from the earlier account. (PREFIX_OLD.com.example.app1 differs from PREFIX_NEW.com.example.app1). This causes functions like notifications to stop working. After doing some research I found that I must contact Apple to change my new prefix into the old. But isn't the old prefix associated with the old account? Can a reuse that prefix? How do I contact Apple to do this?
Another option I am thinking about is to transfer the app back to the old account, delete it, an reupload on my new account from scratch. Would that work? The reason I would transfer it back is that If an app is deleted the same user cannot create an app with the same name. Or has the name been blocked on my new account also?
Any other suggestions?