CoreData migration and file change

[Dan Grassi]

I have a CoreData application and am migrating the data store. When the user opens an old store the migration happens automatically creating a new file. The problem is when the user saves the first time after the migration he gets the message: "This document’s file has been changed by another application since you opened or saved it."

Thanks,

Dan

What is the correct procedure for handling the file change or how can I avoid this message?

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