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', '462864e78ed9ec4813b6dd4fe5613cd3', '216.73.216.20', '1771725194', '1771725194', '/product_info.php?info=p1777_Cape-Verde-4-Satellitenbild.html')

[XT SQL Error]