致命错误超出范围

Question

以下是我在tableView中删除会话行的代码：

func tableView(_ tableView: UITableView, commit editingStyle: UITableViewCellEditingStyle, forRowAt indexPath: IndexPath) {
    if editingStyle == .delete {
        // Get other user id
        let userObjectId = userIds[indexPath.row]

        // query db for that id
        let matchesQuery = PFUser.query()

        matchesQuery?.whereKey("objectId", contains: PFUser.current()?.objectId)
        matchesQuery?.whereKey("accepted", contains: userObjectId)

        matchesQuery?.findObjectsInBackground { (objects, error) in
            if let users = objects {
                for user in users {
                    if let theUser = user as? PFUser {
                        if let accepptedUserIds = theUser["accepted"] as? [String] {
                            for acceptedUserId in accepptedUserIds {
                                for id in self.userIds {
                                    if id == acceptedUserId {
                                        self.userIds = accepptedUserIds.filter{$0 != userObjectId}
                                        PFUser.current()?["accepted"] = self.userIds
                                        PFUser.current()?.saveInBackground(block: { (success, error) in
                                            if success {
                                                if self.images.count == 1 {
                                                    self.images.remove(at: indexPath.row)  // Line raising error
                                                    self.tableView.reloadData()
                                                } else {
                                                    self.images.remove(at: indexPath.row)
                                                    self.tableView.deleteRows(at: [indexPath], with: .left)
                                                }
                                            } else {
                                                print("There was an error removing the match. Please try again.")   
                                            }
                                        })
                                    }
                                }
                            }
                        }
                    }
                }
            }
        }
    } 
}

@IBAction func backTapped(_ sender: Any) {
    dismiss(animated: true, completion: nil)
}

override func touchesBegan(_ touches: Set<UITouch>, with event: UIEvent?) {
    self.view.endEditing(true)
}

Eveytime我尝试在表视图中删除一行我遇到崩溃致命错误，超出范围，有人可以告诉我如何修复我的代码吗？

提前致谢！

造成问题的一行是：