swift – 只能从它所属的Realm中删除一个对象

let realm = try! Realm()
var checklists = [ChecklistDataModel]()

override func viewWillAppear(_ animated: Bool) {


    checklists = []
    let getChecklists = realm.objects(ChecklistDataModel.self)

    for item in getChecklists{

        let newChecklist = ChecklistDataModel()
        newChecklist.name = item.name
        newChecklist.note = item.note

        checklists.append(newChecklist)
    }

    tableView.reloadData()

}

override func numberOfSections(in tableView: UITableView) -> Int {
    return 1
}

override func tableView(_ tableView: UITableView,numberOfRowsInSection section: Int) -> Int {
    return checklists.count
}

override func tableView(_ tableView: UITableView,cellForRowAt indexPath: IndexPath) -> UITableViewCell {
    let cell = tableView.dequeueReusableCell(withIdentifier: "ChecklistCell",for: indexPath) as! ListsTableViewCell

    cell.name.text = checklists[indexPath.row].name
    return cell
}

override func tableView(_ tableView: UITableView,commit editingStyle: UITableViewCellEditingStyle,forRowAt indexPath: IndexPath) {
    if editingStyle == .delete {

        // Delete the row from the data source
        try! realm.write {
            realm.delete(checklists[indexPath.row])
        }

        //delete locally
        checklists.remove(at: indexPath.row)

        self.tableView.deleteRows(at: [indexPath],with: .fade)
    }
}

我知道这部分是具体的：

// Delete the row from the data source
        try! realm.write {
            realm.delete(checklists[indexPath.row])
        }

对于发生了什么的任何想法？
提前致谢！