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', 'ac3c01fc7ba9505de34591c47c7cfaef', '216.73.216.145', '1760895211', '1760895211', '/index.php/language/en/refID/1/cat/c44_3D-Karten.html')

[XT SQL Error]