1366 - Incorrect integer value: '' for column `abtecsho_shop`.`whos_online`.`customer_id` at row 1

insert into whos_online (customer_id, full_name, session_id, ip_address, time_entry, time_last_click, last_page_url) values ('', 'Guest', 'b1le3rgfgrmf4f55lq77pf3u81', '216.73.216.60', '1762811960', '1762811960', '/shop_content.php/coID/200/content/DOWNLOADS')

[XT SQL Error]