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', '7f0287793820c2cc9548f58fc2dc1c43', '18.116.63.236', '1713889016', '1713889016', '/product_info.php/info/p4_Sommertracht.html')

[XT SQL Error]