It has been a few days that i have been learning the basics of Substance Painter. But yesterday i faced a weird problem. When i import a mesh from Maya, it shows a brown spot/patch in the substance Material. The mesh is UVed, Basic material applied, followed all the steps neatly while importing the mesh into SP and baking the maps. No matter what, the brown Patch won't disappear. I am attaching the Screenshots below.....

The mesh modeled and Uved in Maya

Exported obj/fbx. Imported into substance painter. Even after baking the maps the lower portion of the mesh shows in brown.

The log
Absolutely clueless. PLEASE HELP