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', 'gkvv6si5ioqm6ju9gg90lb94v5', '216.73.216.130', '1760457540', '1760457540', '/product_info.php?info=p23_Elektro-Futterdaempfer-26-Liter.html')

[XT SQL Error]