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', '6466e0c017ca87f773b9fe08b52a50e2', '216.73.216.8', '1757921717', '1757921717', '/index.php/language/de/cat/c32_Welt.html')

[XT SQL Error]