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', '67f8045f2476af6cebd2732df43d3d1a', '216.73.216.122', '1758146777', '1758146777', '/shop_content.php/coID/7/content/Kontakt')

[XT SQL Error]