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', 'bfe9e4345e684b171475e24c17d17961', '3.143.218.146', '1714103238', '1714103238', '/index.php/cat/c44_3D-Karten.html?refID=2')

[XT SQL Error]