After update to xcode 13.4.1 I get errors concerning CloudKit core data private sync. When installing an app in an unused simulator I get the following errors, and the icloud data will not sync to or from the device. CoreData: error: CoreData+CloudKit: -[NSCloudKitMirroringDelegate _performSetupRequest:]_block_invoke(1106): <NSCloudKitMirroringDelegate: 0x600000208f70>: Failed to set up CloudKit integration for store: <NSSQLCore: 0x15a506040> <CKError 0x6000037a35d0: "Partial Failure" (2/1011); "Failed to modify some record zones"; partial errors: { com.apple.coredata.cloudkit.zone:defaultOwner = <CKError 0x600003784cc0: "Internal Error" (1/5000); "Failed to sync user keys"> Used simulators where the app has been running earlier and physical devices work, where the icloud private data sync as expected. Same build worked perfect before update. Checked correct container-name, and rebuilt the core data NSManagedObject subclasses. Has anyone had these errors and solved them?