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', '9ae67247b355094d99032dbb654497c3', '216.73.216.20', '1771707619', '1771707619', '/')

[XT SQL Error]