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', 'ap9jba7io7camphorj3ruf7103', '216.73.216.30', '1751839619', '1751839619', '/index.php?cat=c64_Ersatzteile-E-Daempfer.html')

[XT SQL Error]