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', '7b6b901e9d53e3e74f936431ba79a783', '3.141.202.187', '1714087000', '1714087000', '/index.php')

[XT SQL Error]