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', 'd610cbbaa5977c207bcc95c7cfbeeb2b', '216.73.216.3', '1766147013', '1766147013', '/popup_content.php/coID/1')

[XT SQL Error]