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', '6e03f38ac57d6ebcbae4031599200240', '3.88.60.5', '1711662437', '1711662437', '/product_info.php?info=p52_Trompeten-Galopp--Bravour-Polka-.html&XTCsid=18ef4d570fc05d4799b5475265fad7ac')

[XT SQL Error]