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', '51993071a1461f7669e81129588791e0', '216.73.216.108', '1756918499', '1756918499', '/')

[XT SQL Error]