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', '71a038a9449567849c66358cb1112fa3', '3.145.63.136', '1713584559', '1713584559', '/index.php/language/de/cat/c7_3D-Print.html')

[XT SQL Error]