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', 'd90a40d0c2aa7eae4d2a4e69b0f74ee7', '216.73.216.8', '1758048099', '1758048099', '/index.php/cat/c30_Countries.html')

[XT SQL Error]