Proenza Schouler Tote Ps11 Brown Leather Bag

Proenza Schouler PS11 Brown Leather Tote bag with silver-tone hardware Canvas lining Bought this bag from an ebay seller who owns a consignment store. Missing a crossbody strap (bought it that way). Bought it and never used it even once.. Very minor wear from previous owner. Outside shows virtually no visible signs of wear. Inside, there is a stain (see last photo).