1366 - Incorrect integer value: '' for column `shop_db3`.`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', '9157f6221dc2afe315e950d3f3784d4a', '18.191.228.88', '1713242221', '1713242221', '/product_info.php?info=p302_Frecher-Lauser.html&XTCsid=4a502cf522b059da09cfca377185d405')

[XT SQL Error]