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', 'dbe26508e7aaace582abfb14a0af5549', '44.200.169.3', '1670396862', '1670396862', '/index.php/cat/c44_3D-Karten.html?refID=2')

[XT SQL Error]