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', '1e0873e619dc6abe2de797866bd666a8', '3.145.60.166', '1713948561', '1713948561', '/product_info.php?info=p302_Frecher-Lauser.html&XTCsid=a30b88a4b439ebf54b931b21d14e2df9')

[XT SQL Error]