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', 'e7ac8181c164fbb6e9f452cfcd7b1c71', '216.73.216.121', '1751969669', '1751969669', '/shop_content.php/coID/1')

[XT SQL Error]