What causes this lip thing?

Upirium

Using M4 and Morphs +++(Or is it ++ or just +?) and M4 Ultra Morphs and Face Randomizer.
Anyway what is causing the outline along the upperlip?
I can't figure it out I've tried a dozen things trying to change it.

Ademnus

the facial morph likely has a hard-edged lip built in. try dialing down the lip define slider and see if that helps.