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', '85ab45f663096a5a1c2005c8a341e186', '3.144.238.20', '1714139475', '1714139475', '/product_info.php?language=de&info=p248_Memory-Of-Spain.html&XTCsid=2e913f95d614b725a3e8a823e845d351')

[XT SQL Error]