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', '3ab64871dc435402590ef3b9c065e785', '216.73.216.143', '1762687553', '1762687553', '/index.php/language/en/cat/c37_World.html')

[XT SQL Error]