Unknown column 'C.Quantity' in 'field list'

SELECT C.pkCartID,C.fkUserID,C.fkProductID,C.IpAddress,C.CurrentSession,C.Quantity,C.SendQuote,C.Price,C.Status,SPP.fkBrandID,SPP.ProductCode,SPP.ProductName,SPP.Product_Image,SPP.DetailedDescription,SPP.min_order,SPP.MinOrderUnit,SPP.fob FROM cart AS C INNER JOIN smart_product_posting AS SPP ON SPP.pkProductID = C.fkProductID WHERE 1 AND C.CurrentSession = "2lb6easof3df5ebfjf8s011664" AND ( C.CurrentSession = "2lb6easof3df5ebfjf8s011664" OR C.fkUserID = "" )