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', '9e23221ab08de9d695f7d0061f9e9cb2', '3.91.79.134', '1711691910', '1711691910', '/product_info.php?info=p302_Frecher-Lauser.html&XTCsid=9ed062a1d997e94e67f071e9bc3ac71b')

[XT SQL Error]