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', '5a08df5fda152c18fadbbddeb4909b4e', '18.227.161.132', '1714085184', '1714085184', '/index.php')

[XT SQL Error]