ios - Core Data - database not found when Updating App on App Store -


we have app on app store. put new version uses preloaded core data database.

when user fresh install of new version, there no problem.

when user updates previous version, there issue. app appears blank , it's if can't find core data database.

i thought there migration issues when changing core data model. there migration issues should out when updated existing app using no core data using core data?

any advice appreciated.

thanks


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