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', 'c023a8285bf1a72ba2bc9e6361334e77', '216.73.216.198', '1752944483', '1752944483', '/index.php/language/de/refID/1/cat/templates/css_dark_green/img/pixel_trans.gif')

[XT SQL Error]