CKShare“服务器记录已更改”错误

我在保存CKShare时遇到问题。执行共享时,一切正常,但如果共享被取消并尝试再次共享,我会收到错误:

"Server Record Changed" (14/2004); server message = "client oplock error updating record"

以下是我的共享代码:

func share(_ deck: Deck) {

    let zoneID = CKManager.defaultManager.sharedZone?.zoneID


    if let deckName = deck.name {
        selectedDeckForPrivateShare = deckName
    }

    var records = [CKRecord]()


    let deckRecord = deck.deckToCKRecord(zoneID)

    records.append(deckRecord)


    let reference = CKReference(record: deckRecord, action: .none)

    for index in deck.cards {
        let cardRecord = index.cardToCKRecord(zoneID)
        cardRecord["deck"] = reference
        cardRecord.parent = reference

        records.append(cardRecord)

    }


    let share = CKShare(rootRecord: deckRecord)
    share[CKShareTitleKey] = "\(String(describing: deck.name)))" as CKRecordValue?
    records.append(share)
    let sharingController = UICloudSharingController { (controller, preparationCompletion) in


        let modifyOP = CKModifyRecordsOperation(recordsToSave: records, recordIDsToDelete: nil)

        modifyOP.qualityOfService = .userInteractive
        modifyOP.modifyRecordsCompletionBlock = { (savedRecords,deletedRecordIDs,error) in
            preparationCompletion(share, CKContainer.default(), error)

            controller.delegate = self

            if let error = error {
                print(error)

            }
        }


        self.privateDatabase.add(modifyOP)

    }


    sharingController.delegate = self

    self.present(sharingController, animated: true, completion: {

    })   
}

这两种方法 deckToCKRecord() 和 cardToCKRecord() 是我用来将核心数据转换为CKRecord以便共享的数据。非常感谢。