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', 'd6d202cd87f4bfbfd2c8cedd25280321', '216.73.216.20', '1771725380', '1771725380', '/product_info.php?info=p1591_Malaysia-Satellitenbild.html')

[XT SQL Error]