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', '8aqeqfte4lub1ntfou4k9j2pg7', '216.73.216.30', '1751758637', '1751758637', '/product_info.php?info=p60_800758-Ersatzachse-fuer-Bauschubkarre.html')

[XT SQL Error]