If you create a cloned monster, and then create some cloned items (after creating the monster), and then set the cloned monster to carry those items, it will fail to compile.
This happens because the editor saves the cloned items to the file in the order you created them. If the monster is set to carry items that aren't defined yet, it can't handle that.
There's no way to fix it from the editor itself, as far as I can tell, which is the only reason I mention it.
