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', '7e0c3da0b6ba9fa171e23c9c7b15cc08', '34.231.247.88', '1653612994', '1653612994', '/index.php?refID=2')

[XT SQL Error]