Editing a mesh but part of the old texture appears

Hello so I went in and removed the bottoms from this Ea mesh I combined the nude bottom with it however when I go in game there's like black shadows on the sims neck and also the legs of the sim itself still appear as though the bottoms are on when I edited the mesh to do so I was wondering if might be able to help me figure out why this is happening?

I've included pictures of what I'm going for vs in game