Renaming Core Data Entities - colliding with Animation's Transaction

Porting some Core Data code that was written several years ago. It has an entity called Transaction.

This pre-dates Transaction that appeared in Animation.

So Apple is now colliding with my naming.

Looks like light weight migration isn't going to do the trick and I need to do more work for migration to work.

Checking whether there is some magical use of namespace where I could separate my entity use of Transaction. Or it's full weight migration...