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', '9bbe00023fe25300a9629f1c194a9355', '3.145.163.58', '1714180479', '1714180479', '/index.php')

[XT SQL Error]