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', '37211e1ac1dd7e133e7b8ef60d52a8e5', '3.144.20.66', '1732172895', '1732172895', '/index.php?refID=1')

[XT SQL Error]