When attempting to migrate between v1 and v2, I get “Can’t merge models with two different entities named ‘Recipe’ (RuntimeError)” errors. I’ve completed all the changes upto page 50 (pdf b2); though the same error appears even after I’d just created the 2nd model version and assigned it as current.
I am doing the exercises with MacRuby. My -persistentStoreCoordinator method looks like http//gist.github.com/42172 after I added the non-nil options variable. But I got the error above both before and after this change too.
Thoughts on the cause of the error?