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', '22f95b3eeabc79f9970bc03c3ed74ee5', '216.73.216.251', '1752522254', '1752522254', '/shop_content.php/coID/3')

[XT SQL Error]