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', 'gsup4oa4ijvsiavac7iau3luv7', '3.142.53.239', '1747102119', '1747102119', '/product_info.php?info=p34_800598-Hand-Hackfruchtreibe.html')

[XT SQL Error]