Unity makes a duplicate of a created model (after "transfer maps")

Sorry if the title is not clear enough.

I used transfer maps to bake an in-game model based on the high-res one and that is what I get when it goes into Unity:

When I looked what this mesh consists of, I've found that it has the previous result when I used "transfer maps":

Somehow I need to get rid of "env7_king". Maya doesn't see anything in the hierarchy, history is cleaned up...

Hope somebody can help me with this issue.