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', 'fe8aca99fa865cdfb24fb7ca3e4f1bb3', '216.73.217.6', '1753005503', '1753005503', '/index.php/language/de/cat/c30_Countries.html/page/templates/css_dark_green/img/pixel_trans.gif')

[XT SQL Error]