1366 - Incorrect integer value: '' for column `mapshopatlogis`.`whos_online`.`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', '02c0dacfcb54bd2bad1f003f4b67bd0a', '18.204.56.185', '1659976054', '1659976054', '/index.php?refID=1')

[XT SQL Error]