1366 - Incorrect integer value: '' for column `creatihu_shop`.`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', '3edbf589b5148dec33d135902d9b9161', '3.14.130.24', '1714080719', '1714080719', '/index.php?cat=c66_Schilder--Bautafeln.html')

[XT SQL Error]