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', '80f5c54b5a289a02fe49dbd6e624088b', '3.81.79.135', '1711623656', '1711623656', '/product_info.php?language=de&info=p247_Nessun-Dorma.html&XTCsid=7449276e387898a36bd6271988bac6c7')

[XT SQL Error]