尝试删除HKWorkout时出现HealthKit错误“无法找到要删除的某些对象”

Question

当尝试通过以下方式“修改” HKWorkout时，我一直遇到从HealthKit收到此错误的问题：（1）复制现有锻炼（2）更新元数据（3）删除“旧” ”锻炼（在下面的代码中为selectedWorkout），然后（4）保存修改后的新锻炼。此代码有98％的时间正常工作，但是有2％的时间我会收到此错误，并且最终得到重复的锻炼。我做错什么了吗？

顺便说一句，我真的希望HealthKit让我们修改数据，这样就不必跳舞了。

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 
                            }
                        }
                    }
                })