DATABASE ERROR:

SELECT cart.itemscount  AS items_count, sum( cart.itemscount * products.price ) AS items_sum, 
            products.title, cart.item_id, cart.discounted_sum, products.price, cart.pubdate, category.seolink, products.url ,
            cart.id as cart_id, products.id as product_id, products.article_1c, products.article, cart.seria_id, cart.order_id_1c, 
            cart.special_price, cart.kit_id, cart.kit_qty,
              series.id as series_id,
              series.characteristic_guid as characteristic_guid,
              series.store_id as store_id,
              series.series_guid as series_guid,
              series.series_text as series_text,
              series.price as series_price,
              series.qty as series_qty,
              store.title as store_title
			FROM cms_easyshop_cart cart
			LEFT JOIN cms_easyshop_products products ON ( cart.item_id = products.id )
            LEFT JOIN cms_easyshop_categories category ON ( category.id = products.category_id )
            LEFT JOIN cms_easyshop_balances series ON series.id = cart.seria_id
            LEFT JOIN cms_easyshop_stores store ON series.store_id = store.id
			WHERE (cart.user_id=0 AND cart.session_id='b42po3l75mqb0cftirbk2q2v37')
			GROUP BY cart.item_id, cart.seria_id
			ORDER BY cart.id

Unknown column 'cart.discounted_sum' in 'field list'