SQL error when adding new products

-- HikaShop version -- : 2.5
-- Error-message(debug-mod must be tuned on) -- : 1064 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 '),(12,4,)' at line 1 SQL=INSERT IGNORE INTO j8p1d_hikashop_product_category (category_id,product_id,ordering) VALUES (2,4,),(12,4,);

Dear Forummembers,

I installed Hikashop so far i like it and i want to buy the commercial version, but when i want to add new products i get an Sql error:

1064 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 '),(12,4,)' at line 1 SQL=INSERT IGNORE INTO j8p1d_hikashop_product_category (category_id,product_id,ordering) VALUES (2,4,),(12,4,);