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', '1d04c437069e9c54a107e43f92bcc088', '216.73.216.191', '1758157814', '1758157814', '/popup_content.php/coID/1')

[XT SQL Error]