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', 'f9d098a4c5eb3ba9b97a05d7a540fe5e', '3.15.223.129', '1734831067', '1734831067', '/product_info.php/info/p439_Reliefkarten-Konfigurator.html?refID=2')

[XT SQL Error]