title: I am updating an app that i released on the app store. Would it be possible to delete all previously stored entities the user has on first launch?
body: <p>This new updated version of the app has a significant change in how one of the attributes gets stored so i need all previous entities to be erased to avoid errors in the app. I have found how to delete all stored entities but i am only wanting it to happen once on, or before, the first launch of the updated version so it can start fresh (is this even allowed by apple?). I need to know what the best approach to this would be and any help or push in the right direction would be greatly appreciated. </p>