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', '1f2df9d3f947ab13f75c93571b8f02f4', '52.14.8.34', '1713988424', '1713988424', '/index.php/language/de')

[XT SQL Error]