我的firebase保存数据时出现错误

Question

对不起，我的英语是法语。 我有这个错误

firebase.js:1 Uncaught (in promise) Error: Reference.child failed: First   argument was an invalid path = "CUG04,CJS98,CJS17,CKJ50". Paths must be non-empty strings and can't contain ".", "#", "$", "[", or "]"
at validatePathString (firebase.js:1)
at t.child (firebase.js:1) 
at database.ref.once.then.snapshots (generate-token.js:57)

您能帮我吗？我在一个数组中有很多数据，我想像许多孩子一样在firebase数据库中设置

这是我的代码：

enter code here $.ajax({
        type: "GET",
        dataType: "json",
        url: link json

        success: function (data) {
            $('#resultat').html("fichier ");
            if (data != '') {
                myJsonObj = data
            }
            var taillemyJsonObj = myJsonObj.length;
            for (var j = 0; j < filteredAndMappedSubjects.length; j++) {
                console.log("ok");
                for (var i = 0; i < taillemyJsonObj; i++) {
                    if (filteredAndMappedSubjects[j] === myJsonObj[i].title.en) {
                        sequenceid[i] = myJsonObj[i].sequenceId;     
                    }
                }
            }
            console.log(sequenceid);
            resetUserInterface(sequenceid);
        },
    });
});

}）

这是我的接收功能，通常将每个序列ID设置到数据库firebase中

function updateSubscriptiononserver(currentToken, sequenceid) {
if (isSubscribed) {
    ref.on('value', function (snap) {
        sequenceid = snap.val();
        console.log("okkk")
    })
    return database.ref("/tokens").orderBychild("uid").equalTo(currentToken)
        .on('child_added', snapshort => snapshort.ref.remove())
        console.log("okkk")
}
database.ref('/tokens').once('value')
    .then(snapshots => {
        let deviceExists = false
        snapshots.forEach(childSnapshot => {
            if (childSnapshot.val() === currentToken) {
                deviceExists = true
                return console.log('Device already registered.');
            }
        })
        console.log("oooooooo", sequenceid);
        if (!deviceExists) {
            return database.ref(`/tokens`).child(sequenceid).set({
                token: currentToken,
            })
        }

    })

}