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', '9bf32007fc6e83e90617c6b97e46dd5c', '216.73.216.20', '1771725120', '1771725120', '/shop_content.php?coID=1')

[XT SQL Error]