remove scene and update thumbs

I use

krpano.call("scene.removearrayitem("+sceneName+");");

to remove a scene in my tour.

Now i want to update the thumbs, i try this :

krpano.call("removeplugin(get(thumbname));");
krpano.call("skin_addthumbs();");

And it works but a layer appears with the name of the last thumb