DB Error

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DB Error:

SQL Invalid: SELECT DISTINCT(product_to_category2.product_id),product.product_name,product.product_short_desc,product.product_image1_thumbnail FROM product_to_category2,product,category2 WHERE  category2.category2_id = product_to_category2.category2_id AND category2.category2_status = '1' AND  product.product_id = product_to_category2.product_id  AND product_to_category2.category2_id = '172' ORDER BY product.product_sort LIMIT -3, 30
Mysql error description: 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 '-3, 30' at line 1
Mysql error number: 1064
Script: http://www.aboveboardelectronics.com/product_categories.php?cid=172&sort=&limit=30