That has to be your clue, two skins and as the 2 skin one is having the prob maybe you could delete one skin(swap if results return zero) and see what that does or like you say, recompile the model/entity.

I often run into probs like this, somehow, GStudio manages to 'hold' onto probs from one file or script and never lets go. My only recourse is to try again and note every step, but thats not always successful.