TTH Database Error

mySQL query error: SELECT * FROM product WHERE active='1' AND id_catpd=26 AND id_product<>150 ORDER BY thu_tu asc , id_catpd DESC LIMIT -20,20 mySQL error: 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 '-20,20' at line 1 mySQL error code: Date: Friday 20th 2019f September 2019 08:36:48 AM