Firebase function not getting called

I have a likes value in the database and i want to change the value STATE when likes is more than 10. Here is my database structure

My firebase function

'use strict';

const functions = require('firebase-functions');
const admin = require('firebase-admin');
admin.initializeApp(functions.config().firebase);

exports.newPost = functions.database
.ref('/QUESTIONS/SPANISH/{postID}'/"LIKES")
.onWrite(function(event) {

 const likes=event.data.value;
 const id=event.params.postID;

 if(likes>10){

    return event.data.ref.parent.child('STATE').set("ACEPTED");
 }
 return false;

});

The function is deployed correctly and all but when i increment the likes nothing happens, what i am doing wrong?

via Tinco De Simone