1366 - Incorrect integer value: '' for column `hbl_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', 'pqjcohuvcn2se6c5lovir3b136', '3.14.150.131', '1746950620', '1746950620', '/product_info.php?info=p630_800321-Einsatz-fuer-Elektro-Futterdaempfer-100-Liter.html')

[XT SQL Error]