ios - Change entity and update app -


i have app in app store, added new attribute entity. how can update user's entity without deleting app , lose data?

thanks

1) click on xcdatamodel file in xcode
2) choose menu editor in upper bar
3) click on add version model
4) create new model based on previous 1
5) perform updates in new created xcdatamodel file

the app automatic handle updates


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