Found the reason why.
I had a locally cached database that was in conflict with the model (I changed the type of an attribute).
I removed the cache as explained here and that fixed the issue
Chris Tof
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Found the path with that code :
let urlApp = FileManager.default.urls(for: .applicationSupportDirectory, in: .userDomainMask).last
let url = urlApp!.appendingPathComponent("default.store")
if FileManager.default.fileExists(atPath: url.path) {
print("swiftdata db at \(url.absoluteString)")
}
THen once in that folder I did
rm -rf default*
And the local coach is gone!
This is fixed in iOS 14
Actually a simple application showing just a draggable image has the problem on my iPad. It looks like this works from the simulator but not on ios devices. I submitted a bug report. Thanks for your feedback.