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', '9lud0m1j3k5cscnr1m601mdpu2', '34.229.113.106', '1563541017', '1563541017', '/shop/index.php?cat=c6_DVR-Digital-Rekorder.html')

[XT SQL Error]