Custom Zones Are Not Allowed in Public DB / Xcode 13 & iOS 15

Hi All

I am hitting an issue when developing an app that uses the CloudKit Public DB. I am relatively new to this, and I may be doing something wrong. I have distilled the issue to use just the template app that comes when you create a new Core Data with iCloud app, and detailed the steps below. My question is basically, am I doing something stupid? If I'm not then seems likely it's a bug in Xcode and I'll just have to wait.

In a nutshell, syncing to the public DB works for the first run of the app only. Stopping and restarting the app seems to throw errors and cause the mirroring delegate to fail.

Step by simple step, I can recreate my issue with this:

1. Create App with Use Core Data and Host in ICloud - interface is SWiftUI

2. In project signings and capabilities add iCloud and Background Modes

3. In nearly appeared iCloud section enable Cloudkit and choose or create a container

4. In newly appeared Background Modes section enable Remote Notifications

5. In persistence.swift add :

import CloudKit

1. Still in persistence.swift add the following:

guard let description = container.persistentStoreDescriptions.first else

{

    fatalError("Something bad happened") }

description.cloudKitContainerOptions?.databaseScope = .public

I have added the above just before the following line:

container.loadPersistentStores(completionHandler: { (storeDescription, error) in

1. In he schema model, highlight the default configuration and check in the data model inspector that "use cloudkit" is checked

2. Run the app and hit the + a few times to add some records.

3. Check on Cloudkit Dashboard in the public database in the container selected / created in step 3 after I created indexes on recordName / modifiedTimestamp in order to view the records on the CD_Item entity. Unfortunately, my Cloudkit Dashboard seems to have changed. Whereas before I could click Indexes and then add the recordName (queryable) / moodifiedTimestamp (queryable / sortable), I don't seem to be able to select these fields anymore - but that's another issue. Luckily I had created the indexes a while back and after a minute or so all appear in the public database. No errors are reported in the console window on Xcode.

4. Stop and restart the app.

5. This time when I click the plus button, the timestamp records are not being uploaded to the public DB (though they do appear on the screen) and the console is reporting error messages similar to that below:

CoreData: CloudKit: CoreData+CloudKit: -NSCloudKitMirroringDelegate _finishedRequest:withResult:: Finished request: <NSCloudKitMirroringExportRequest: 0x283666bb0> 9F190C45-7713-4ACE-96DB-867D99FF62ED with result: <NSCloudKitMirroringResult: 0x2838b9e20> success: 0 madeChanges: 0 error: Error Domain=NSCocoaErrorDomain Code=134406 "Request '9F190C45-7713-4ACE-96DB-867D99FF62ED' was aborted because the mirroring delegate never successfully initialized due to error: <CKError 0x2836aba50: "Partial Failure" (2/1011); "Failed to modify some record zones"; uuid = 3F399390-1F10-4198-BBBF-F3BD76E99591; container ID = "iCloud.XXXXXXXXXXX"; partial errors: { com.apple.coredata.cloudkit.zone:defaultOwner = <CKError 0x2836a5290: "Server Rejected Request" (15/2027); server message = "Custom zones are not allowed in public DB"; op = 943153DA6AC169A1; uuid = XXXXXXXXXXXXXXXXXXXXXXXX> }>" UserInfo={NSLocalizedFailureReason=Request '9F190C45-7713-4ACE-96DB-867D99FF62ED' was aborted because the mirroring delegate never successfully initialized due to error: <CKError 0x2836aba50: "Partial Failure" (2/1011); "Failed to modify some record zones"; uuid = 3F399390-1F10-4198-BBBF-F3BD76E99591; container ID = "iCloud.XXXXXXXXX"; partial errors: { com.apple.coredata.cloudkit.zone:defaultOwner = <CKError 0x2836a5290: "Server Rejected Request" (15/2027); server message = "Custom zones are not allowed in public DB"; op = 943153DA6AC169A1; uuid = XXXXXXXXXXXXXXXXXXXXXXXXX> }>}

Thanks in advance for any assistance anyone can offer,

Ian