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', 'cba8f2578e7c0370193a18f27ce374d8', '18.116.63.236', '1713966885', '1713966885', '/index.php')

[XT SQL Error]