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', '0bnl1f82m9tu8q3lp9o8e3asa7', '18.97.14.84', '1749967927', '1749967927', '/product_info.php?info=p573_806378-Bruehkessel--Kochkessel-150-Liter--6-kW.html')

[XT SQL Error]