1366 - Incorrect integer value: '' for column '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', '3d53179e9d0de3b85c4a4e57fde92f92', '3.142.200.226', '1714157866', '1714157866', '/product_info.php/info/p5_Bluetenhonig.html')

[XT SQL Error]