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', 'l430ks4f5l8bqfq823ebk4d343', '216.73.216.89', '1767068327', '1767068327', '/product_info.php?info=p510_Flugmischung-fuer-Turbo--Meister-25kg-LTM.html')

[XT SQL Error]