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', '227b0cafa3c4f822ede54455522c086a', '18.204.56.185', '1659977069', '1659977069', '/index.php/language/de/cat/c7_3D-Print.html')

[XT SQL Error]