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', '91ac8b3f448dae78d3b4fe95f9eabac5', '18.119.253.93', '1713505853', '1713505853', '/product_info.php?info=p228_Auf-Wiedersehn.html&XTCsid=7541ba64dfef2679c790315e735061c1')

[XT SQL Error]