1366 - Incorrect integer value: '' for column `argus_xtc`.`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', '4jj4hqpfp56ukbgdnm2mdg26a4', '3.85.143.239', '1558358427', '1558358427', '/shop/index.php?cat=c1_Ueberwachungskameras.html')

[XT SQL Error]