[add-on] Discount Code (support) in Order Total Modules Posted August 22, 2011 Thank you for posting your fix! Worked for me too. I was having the same problem getting a 1054 - Unknown column. The Discount Code 2.6 for osCommerce 2.3.1 (full install pkg) is missing this "customers_id" line in the SQL Query step 1. So if you haven't installed add `customers_id` text, right after: `excluded_products_id` text, before running the query. Or just go to your myphpadmin and add a row in the table. I must be missing something because I tried this and it still does not carry over..