1366 - Incorrect integer value: '' for column `mapshopatlogis`.`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', '3c361401b88d76cca7d4b681ef903c55', '216.73.216.198', '1752880636', '1752880636', '/shop_content.php/coID/4')

[XT SQL Error]