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', 'c72e89456797455e74f22e6693dab84a', '216.73.216.198', '1752879028', '1752879028', '/index.php/language/de/cat/c44_3D-Karten.html')

[XT SQL Error]