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', 'e8e7760d24b15425091947102f1e108b', '3.149.238.239', '1722054642', '1722054642', '/index.php?refID=2')

[XT SQL Error]