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', '6265a8f03f079175763a3eff7f7310df', '3.239.76.25', '1709057430', '1709057430', '/index.php?refID=2')

[XT SQL Error]