Core-data private configuration crashes

Question

Trying to create Private configuration in Core data and export it to Cl;oudKit private database with NSPersistentCloudKitContainer. As a first step, inside the core data model, created a new private configuration. Created a new entity which by default dets added to default configuration. Dragged the newly created entity from default configuration to the private configuration. It crashes. Am I doing this right? If so is it Xcode 13.3.1 bug ? and should I upgrade?

Once I get past this issue, I plan to load persistent stores to export/synchronize the new entity from core data private configuration to cloudkit private database, which will hopefully work.

container.loadPersistentStores(completionHandler: { (loadedStoreDescription, error) in
  if let loadError = error as NSError? {
    fatalError("###\(#function): Failed to load persistent stores:\(loadError)")
  } else if let cloudKitContainerOptions = loadedStoreDescription.cloudKitContainerOptions {
    if #available(iOS 14.0, *) {
      if .public == loadedStoreDescription.cloudKitContainerOptions?.databaseScope {
        self._publicPersistentStore = container.persistentStoreCoordinator.persistentStore(for: loadedStoreDescription.url!)
      } else if .private == loadedStoreDescription.cloudKitContainerOptions?.databaseScope {
        self._privatePersistentStore = container.persistentStoreCoordinator.persistentStore(for: loadedStoreDescription.url!)
      } 
    } else {
      // Fallback on earlier versions
    }
  }