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', '8ab4c85ec03f64a8c14a6c2d65e269ef', '3.235.228.219', '1656405354', '1656405354', '/index.php?refID=1')

[XT SQL Error]