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', '2493446b6ecc915b4a7256dd21247f4a', '216.73.216.35', '1751520314', '1751520314', '/index.php/language/de/cat/c38_Karten-Konfigurator.html')

[XT SQL Error]