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', '6a918886fae84c5ff740a8d728a94a0e', '216.73.216.220', '1769793331', '1769793331', '/popup_content.php/coID/1')

[XT SQL Error]