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', 'ff8oua7irvakp4l1dbhdtcs2r0', '3.85.143.239', '1558357972', '1558357972', '/shop/index.php?cat=c6_DVR-Digital-Rekorder.html')

[XT SQL Error]