I've got a CoreDatabase model that's already utilized in the Application Store, so I have to devise a method to migrate the model without losing the prior data. I've an entity that presently doesn't have a parent or gaurdian object, but I have to set its parent entity within the new model. However, after i try to get this done, I recieve an accident that states that CoreData was not able emigrate the database model.

If anybody could offer an understanding of the way i would make this happen, I'd really be thankful!

EDIT: I recieve an Cannot migrate store in-place error using the underlying error of "SQLite error code:1, 'no such table: _T_ZCONTACT', reason=Unsuccessful to complete migration claims". The "Contact" may be the title from the entity I have to alter the parent for.