Urgent : Duplicate other blocks when used custom asset manager

Hello, 
We have modified the Assset manager with custom one. But we are having problem now. If we drop one image into canvase and then add any other component , it will duplicate that component. If we add another image then it would triplet other component.

Can you please help us.
Below is the code snippet that we have used to open our custom asset manager.

editor.Commands.add('open-assets', {
        run: function (editor, sender, opts)
        {
            var classofelement = opts.target.attributes.property == "background-image" ? "wrapper" : opts.target.cid;
            AjaxRequestStart();
            $.ajax({
                url: '@Url.Action("FilesForm", "File")',
                type: 'POST',
                dataType: "html",
                contentType: "application/json; charset=utf-8",
                data: JSON.stringify({ classOfSelectedElement: classofelement }),
                success: function (result) {
                    editor.Modal.open();
                    $("#gjs-mdl-c").html(result);
                },
                error: function (err, xhr, thrownError) {
                },
                complete: function () {
                    AjaxRequestEnd();                    
                }
            });

        }
    });