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', '864fd818b4a28e3c4d03a4f5b225a840', '216.73.216.121', '1751966423', '1751966423', '/index.php/language/en')

[XT SQL Error]