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', '981bc1420194f0137ad9648bbedce8d3', '216.73.216.8', '1758011588', '1758011588', '/index.php/language/en/cat/c33_Satellitenbilder-Digital.html')

[XT SQL Error]