Swift 6 and NSPersistentCloudKitContainer

Hello all!

I'm porting a ios15+ swiftui app to be compatible with Swift 6 and enabling strict concurrency checking gave me a warning that will be an error when switching to swift 6.

I'm initializing a persistence controller for my cloud kit container:

import CoreData
 
struct PersistenceController {
    static let shared = PersistenceController()
 
    let container: NSPersistentCloudKitContainer
 
    init() {
        container = NSPersistentCloudKitContainer(name: "IBreviary")
 
        container.loadPersistentStores(completionHandler: { _, error in
            if let error = error as NSError? {
                fatalError("Unresolved error \(error), \(error.userInfo)")
            }
        })
 
        container.viewContext.mergePolicy = NSMergeByPropertyObjectTrumpMergePolicy
        container.viewContext.automaticallyMergesChangesFromParent = true
    }
}

The warning is on the merge policy:

Reference to var 'NSMergeByPropertyObjectTrumpMergePolicy' is not concurrency-safe because it involves shared mutable state; this is an error in the Swift 6 language mode

I have no idea how to make this concurrency safe, nor I found a documentation entry to help me with this.

Anyone have idea how to solve this?

Thanks in advance V.