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', 'e1dbaf42c15cb60b28635896b79d5700', '18.219.63.90', '1714122157', '1714122157', '/index.php')

[XT SQL Error]