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', '47a1e8ec08f2bf8cb8f8ad3d635218ce', '18.204.56.185', '1659974813', '1659974813', '/product_info.php/info/p439_Reliefkarten-Konfigurator.html?refID=2')

[XT SQL Error]