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', 'ns6v9vmd1je4mqjn1jh4jca4h2', '3.15.164.218', '1746790602', '1746790602', '/product_info.php?info=p37_801939-Elektrische-Schrotmuehle.html')

[XT SQL Error]