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', 'm2pfup580kk7968otcfr46b4l2', '216.73.216.45', '1758049874', '1758049874', '/shop_content.php/coID/13')

[XT SQL Error]