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', '16oin7c6rpeb02imp0bmh3s4u7', '216.73.216.116', '1751333365', '1751333365', '/product_info.php?info=p541_Grittkasten--Futterkasten-f--Tauben--Wachteln---Kleingefluegel-m-.html')

[XT SQL Error]