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', 'b29fec7669ccf150f8927331d6544b68', '3.135.183.89', '1714093318', '1714093318', '/index.php/language/de/cat/c19_Reliefkarten-Digital.html')

[XT SQL Error]