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', '2ca7a9dea6ed2f8f2500b2842e27ed28', '44.200.169.3', '1670393940', '1670393940', '/product_info.php/info/p439_Reliefkarten-Konfigurator.html?refID=2')

[XT SQL Error]