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', '7tbkpvv11m3ohggl5euo87jg80', '18.189.189.4', '1746785860', '1746785860', '/product_info.php?info=p608_804688-Knochenpresse.html')

[XT SQL Error]