Problem with creation solved!!!

Hello! I tried to make pants but when it loads on game it appears darker in one place this is the photo which I show where the problem is: 68.media.tumblr.com/e84eb78edb4373399fe000aa5780db83/tumblr_orce52ySqD1vz7sq5o1_540.png

and here is the file: uploadfiles.io/mnvet



Please can anyone help me with that???