1366 - Incorrect integer value: '' for column `shop_db3`.`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', '44e0ad8eca0ecda84addc1b74416e161', '3.136.97.64', '1713946571', '1713946571', '/product_info.php?language=de&info=p248_Memory-Of-Spain.html&XTCsid=7e0b503625393bfa750f9a995afb0aa8')

[XT SQL Error]