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', '971fe348803639f037157ede4c794ea2', '3.142.171.180', '1713487739', '1713487739', '/index.php/language/en/cat/c35_Countries.html/page/2')

[XT SQL Error]