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', '6c24c298fe4f4edf6b3dafed8751869a', '216.73.216.191', '1758178384', '1758178384', '/shop_content.php/coID/25')

[XT SQL Error]