unexisting "price_final" field issue

[John R]

Hi, I got the following error in my admin panel:
Unknown column 'price_final' in 'where clause'

SELECT SQL_CALC_FOUND_ROWS

 b.*, a.*, cp.`position`, i.`id_image` 
 FROM `ps_product` a
 LEFT JOIN `ps_product_lang` b ON (b.`id_product` = a.`id_product` AND b.`id_lang` = 1)

 LEFT JOIN `ps_image` i ON (i.`id_product` = a.`id_product` AND i.`cover` = 1)
 LEFT JOIN `ps_category_product` cp ON (cp.`id_product` = a.`id_product`) 
 WHERE 1 AND cp.`id_category` = 16 AND a.`price` LIKE '%5%'  AND `price_final` LIKE '%8.90%'  AND a.`quantity` = 5  AND `active` = 1 


 ORDER BY `position` ASC
 LIMIT 0,50

I've checked I i really do not have such column in my ps_products table.

Please, advice.

PS: My PrestaShop version is 1.2.1.0