为了更新核心数据中的数据（当核心数据中已经有数据时），我删除了所有数据，然后重新插入数据。但我不知道为什么会发生合并冲突。我对核心数据还不熟悉，所以我也搞不清楚它到底出了什么问题。我想我需要更改我的deleteAll函数，但我不知道该更改什么。

代码如下。

Could not merge changes.
Error Domain=NSCocoaErrorDomain Code=133020 "Could not merge changes." UserInfo={conflictList=(
    "NSMergeConflict (0x6000008fdd00) for NSManagedObject (0x600003e80e60) with objectID '0x95773100e3922989 <x-coredata://60FADEF9-22B4-46FC-B17C-2B722FE843F7/Languages/p79417>' with oldVersion = 1 and newVersion = <deleted> and old object snapshot = {\n    code = es;\n    icon = spain;\n    isChecked = 0;\n    title = Spanish;\n}",
    "NSMergeConflict (0x6000008fda00) for NSManagedObject (0x600003e80aa0) with objectID '0x95773100e2722989 <x-coredata://60FADEF9-22B4-46FC-B17C-2B722FE843F7/Languages/p79414>' with oldVersion = 1 and newVersion = <deleted> and old object snapshot = {\n    code = fr;\n    icon = france;\n    isChecked = 1;\n    title = French;\n}",
    "NSMergeConflict (0x6000008fdbc0) for NSManagedObject (0x600003e80cd0) with objectID '0x95773100e3322989 <x-coredata://60FADEF9-22B4-46FC-B17C-2B722FE843F7/Languages/p79420>' with oldVersion = 1 and newVersion = <deleted> and old object snapshot = {\n    code = cn;\n    icon = china;\n    isChecked = 0;\n    title = Chineses;\n}",
    "NSMergeConflict (0x6000008fdd80) for NSManagedObject (0x600003e80d20) with objectID '0x95773100e3d22989 <x-coredata://60FADEF9-22B4-46FC-B17C-2B722FE843F7/Languages/p79419>' with oldVersion = 1 and newVersion = <deleted> and old object snapshot = {\n    code = kr;\n    icon = \"south-korea\";\n    isChecked = 0;\n    title = Korean;\n}",
    "NSMergeConflict (0x6000008fdc80) for NSManagedObject (0x600003e80b40) with objectID '0x95773100e2122989 <x-coredata://60FADEF9-22B4-46FC-B17C-2B722FE843F7/Languages/p79413>' with oldVersion = 1 and newVersion = <deleted> and old object snapshot = {\n    code = us;\n    icon = \"united-states-of-america\";\n    isChecked = 1;\n    title = English;\n}",
    "NSMergeConflict (0x6000008fddc0) for NSManagedObject (0x600003e80dc0) with objectID '0x95773100e3f22989 <x-coredata://60FADEF9-22B4-46FC-B17C-2B722FE843F7/Languages/p79418>' with oldVersion = 1 and newVersion = <deleted> and old object snapshot = {\n    code = jp;\n    icon = japan;\n    isChecked = 0;\n    title = Japanese;\n}",
    "NSMergeConflict (0x6000008fdb80) for NSManagedObject (0x600003e809b0) with objectID '0x95773100e2522989 <x-coredata://60FADEF9-22B4-46FC-B17C-2B722FE843F7/Languages/p79415>' with oldVersion = 1 and newVersion = <deleted> and old object snapshot = {\n    code = ru;\n    icon = russia;\n    isChecked = 1;\n    title = Russian;\n}",
    "NSMergeConflict (0x6000008fda40) for NSManagedObject (0x600003e801e0) with objectID '0x95773100e3b22989 <x-coredata://60FADEF9-22B4-46FC-B17C-2B722FE843F7/Languages/p79416>' with oldVersion = 1 and newVersion = <deleted> and old object snapshot = {\n    code = it;\n    icon = italy;\n    isChecked = 1;\n    title = Italien;\n}"
), NSExceptionOmitCallstacks=true}

private var persistenceManager = PersistenceManager.shared
private let request: NSFetchRequest<Languages> = Languages.fetchRequest()
private var coreDataLanguages: [Languages]

..

persistenceManager.deleteAll(request: request)
coreDataLanguages.forEach { language in    
    let language = Setting(isChecked: language.isChecked, title: language.title!, code: language.code!, icon: language.icon!)
    persistenceManager.insertLanguage(language: language)
}

class PersistenceManager {
    
    static var shared: PersistenceManager = PersistenceManager()
    
    var persistentContainer: NSPersistentContainer = {
        let container = NSPersistentContainer(name: "Setting")
        
        container.loadPersistentStores(completionHandler: { (storeDescription, error) in
            if let error = error as NSError? {
                fatalError("Unresolved error \(error), \(error.userInfo)")
            }
        })
        return container
    }()
    
    var context: NSManagedObjectContext {
        return self.persistentContainer.viewContext
    }

    func saveContext() {
        if context.hasChanges {
            do {
                try context.save()
                print("Data Saved to Context")
            } catch {
                let nserror = error as NSError
                fatalError("Unresolved error \(nserror), \(nserror.userInfo)")
            }
        }
    }

    @discardableResult
    func insertLanguage(language: Setting) -> Bool {
        let entity = NSEntityDescription.entity(forEntityName: "Languages", in: self.context)
        if let entity = entity {
            let managedObject = NSManagedObject(entity: entity, insertInto: self.context)
            managedObject.setValue(language.isChecked, forKey: "isChecked")
            managedObject.setValue(language.title, forKey: "title")
            managedObject.setValue(language.code, forKey: "code")
            managedObject.setValue(language.icon, forKey: "icon")
            
            do {
                try self.context.save()
                return true
            } catch {
                print(error)
                print(error.localizedDescription)
                return false
            }
        } else {
            return false
        }
    }

    @discardableResult
    func deleteAll<T: NSManagedObject>(request: NSFetchRequest<T>) -> Bool {
        let request: NSFetchRequest<NSFetchRequestResult> = T.fetchRequest()
        let delete = NSBatchDeleteRequest(fetchRequest: request)
        
        do {
            try self.context.execute(delete)
            try self.context.save()
            return true
        } catch {
            print(error.localizedDescription)
            return false
        }
    }
}

我可以使用saveContext来保存核心数据，但我也需要更改位置，并且在重新启动后它不起作用。重新启动后，元素的顺序就像我第一次设置的一样。所以我想知道为什么如果我删除所有的数据，它是不起作用的。

如果您能提供任何帮助，我将不胜感激。