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', 'a00f5ef9a3b1f501fa67cee64ca0f4de', '216.73.216.191', '1764597902', '1764597902', '/popup_content.php/coID/1')

[XT SQL Error]