Problem with dhtmlxdataprocessor.js

every time that I try to update a form occurs a breakpoint in the line 124 of dhtmlxdataprocessor.js and after that the record is updated but also inserted at the same time and duplicates the data when any update is performed.

TypeError: this.obj.getUserData is not a function

if (existing && mode == ‘updated’) mode = existing;

Can you share some kind of sample or an online demo where issue can be checked ?