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', '0oh1kkcemhkrsdtod4fh9ej9f2', '3.16.24.18', '1746937218', '1746937218', '/product_info.php?info=p638_806347-Wachsbehaeltereinsatz-fuer-150-L-Bruehkessel-Edelstahlkessel.html')

[XT SQL Error]