You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near '(Детские),Boardshort,Brand,Stretch,Denim,2016" WHERE productID=21194' at line 1
UPDATE SC_products SET `meta_keywords_ru`="Blue,21.5",(Детские),Boardshort,Brand,Stretch,Denim,2016" WHERE productID=21194