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', '14f2c4e2m561ul6rme4j2pmkd1', '216.73.216.116', '1751324300', '1751324300', '/product_info.php?info=p59_800741-Schlauch-fuer-Schubkarrenrad.html')

[XT SQL Error]