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', 'f3c12d79720556531d6b62e1d37851e9', '216.73.216.3', '1766402639', '1766402639', '/product_info.php/language/de/refID/1/info/p439_Reliefkarten-Konfigurator.html')

[XT SQL Error]