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', 'b477a8ec967702a29b0f8994a3f3e8e2', '216.73.216.198', '1752880736', '1752880736', '/shop_content.php/coID/2')

[XT SQL Error]