After upgrading to Xcode 12.5 and launching the app for the first time in the Simulator (not logged into iCloud) the app loads some data into the empty CoreData database no migration errors show up After restarting the app for a second launch the "skipping migration" errors are back in the log.

Additional info to my questions above: even if I delete the app from the test device reset the Development Environment in the CloudKit dashboard for my apps container then reinstall the app out of Xcode the same "skipping migration" error shows up in the console. This does not make sense to me. Why after all CoreData DBs on test device(s) have been cleared and newly compiled code has been installed on device. Shouldn't Xcode use the current NSManagedObjectModel as the new zero generation model, and thus not need any migration!? What do I miss here? Or is this a CoreData bug? P.S. the log shows these lines: Skipping migration for 'ANSCKMETADATAENTRY' because it already has a column named 'ZDATEVALUE' Skipping migration for 'ANSCKRECORDMETADATA' because it already has a column named 'ZNEEDSUPLOAD' Skipping migration for 'ANSCKRECORDMETADATA' because it already has a column named 'ZNEEDSLOCALDELETE' Skipping migration for 'ANSCKRECORDMETADATA' because it already has a column named 'ZNEEDSCLOUDDELETE' Skipping migration for 'ANSCKRECORDMETADATA' because it already has a column named 'ZLASTEXPORTEDTRANSACTIONNUMBER' Skipping migration for 'ANSCKRECORDMETADATA' because it already has a column named 'ZPENDINGEXPORTTRANSACTIONNUMBER' Skipping migration for 'ANSCKRECORDMETADATA' because it already has a column named 'ZPENDINGEXPORTCHANGETYPENUMBER' Skipping migration for 'ANSCKRECORDZONEMETADATA' because it already has a column named 'ZLASTFETCHDATE' Skipping migration for 'ANSCKRECORDZONEMETADATA' because it already has a column named 'ZSUPPORTSFETCHCHANGES' Skipping migration for 'ANSCKRECORDZONEMETADATA' because it already has a column named 'ZSUPPORTSATOMICCHANGES' Skipping migration for 'ANSCKRECORDZONEMETADATA' because it already has a column named 'ZSUPPORTSRECORDSHARING' Skipping migration for 'ANSCKRECORDZONEMETADATA' because it already has a column named 'ZNEEDSIMPORT' Skipping migration for 'ANSCKRECORDZONEMETADATA' because it already has a column named 'ZNEEDSRECOVERYFROMZONEDELETE' Skipping migration for 'ANSCKRECORDZONEMETADATA' because it already has a column named 'ZNEEDSRECOVERYFROMUSERPURGE'