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', '48b699a37b6ce8494818dae720deb981', '3.16.66.206', '1713404021', '1713404021', '/product_info.php/language/de/info/p2823_Heard-I--Reliefkarte.html')

[XT SQL Error]