Javascript 失败：未捕获尝试使用指向新的未保存对象的指针保存对象

我有这个错误，这是我的云代码

var HighScore = Parse.Object.extend("HighScore");
highScore = new HighScore();
highScore.set("totalXp", request.params.totalXp);
highScore.set("regionId", request.params.regionId);

var relation = highScore.relation("userId");
relation.add(request.user);

highScore.save();

response.success(highScore);

响应返回为空，但奇怪的是，当我查看数据浏览器时，关系添加成功

找不到可靠的答案或解释。请帮忙。

我参考了，并修改了我的代码。原因是我将创建对象和添加关系放在1 save（）操作中

var HighScore = Parse.Object.extend("HighScore");
highScore = new HighScore();
highScore.set("totalXp", request.params.totalXp);
highScore.set("regionId", request.params.regionId);

highScore.save(null, {
    success: function(savedHighScore){
            var relation = savedHighScore.relation("userId");
            relation.add(request.user);
            //relation.add(Parse.User.current());
        savedHighScore.save(null, {
            success: function(finalHighScore){
                response.success(finalHighScore);
            },
            error: function(finalHighScore, error){
            }
        });
    },
    error: function(highScore, error){
        console.log("failed to create");
    }
});