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', '8c9b87605001ecf9a4f59f86e6f40261', '216.73.216.8', '1757920107', '1757920107', '/index.php/language/de/cat/c38_Karten-Konfigurator.html')

[XT SQL Error]