尝试删除hkworkout时,healthkit错误“未能找到要删除的某些对象”

在尝试“修改”一个 HKWorkout 通过(1)复制现有训练(2)更新元数据(3)删除“旧”训练(在下面的“我的代码”中选择的训练),然后(4)保存新修改的训练。98%的时间,这段代码工作完美,但2%的时间,我会得到这个错误,我结束了重复的训练。我做错什么了吗?

作为旁白,我真的希望healthkit能让我们修改数据,这样就不必跳这个舞了。

class func updateMetadataDeleteOldAndSaveNewWorkout(selectedWorkout: HKWorkout, handler: @escaping (Bool,WorkoutManagerError? ) -> Void) {   

    //configure metadata   

    //  Create a new workout with the old workout's fields and new edited metadata object
                let newWorkout = HKWorkout(activityType: selectedWorkout.workoutActivityType, start: selectedWorkout.startDate, end: selectedWorkout.endDate, duration: selectedWorkout.duration, totalEnergyBurned: selectedWorkout.totalEnergyBurned, totalDistance: selectedWorkout.totalDistance, metadata: metadata)

                // Delete the old workout
                HealthStoreSingleton.sharedInstance.healthStore.delete(selectedWorkout, withCompletion: { (success, error) in

                    DispatchQueue.main.async {

                     if let unwrappedError = error  {
                         handler(false, WorkoutManagerError.deleteError(unwrappedError.localizedDescription))
                        return 
                     }
                    }

                    //  When delete was successful save the new workout
                    HealthStoreSingleton.sharedInstance.healthStore.save(newWorkout) { success, error in

                        DispatchQueue.main.async {
                            if let unwrappedError = error {
                                handler(false, WorkoutManagerError.saveError(unwrappedError.localizedDescription))
                                return 
                            }

                            if success {

                                handler(true, nil)
                                return 
                            } else {
                                  handler(false, WorkoutManagerError.saveError("\(String(describing: error))"))
                                  return 
                            }
                        }
                    }
                })