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', 'd2c249e39311eebb534445b3cf187a4d', '18.224.30.118', '1713520777', '1713520777', '/index.php')

[XT SQL Error]