If an account has an owner that doesn't exist you can not park a subdomain of the main domain

Symptoms

You get an error when trying to park a subdomain of the main domain with "Share document root" selected.

The error:

Sorry, you can not add a DNS record for a subdomain of another user’s domain. 

Description

When a cPanel account has an owner set to a reseller that doesn't exist the cPanel user is not able to create a subdomain of the users main domain and parked with "Share document root" selected.

We've opened an internal case for our development team to investigate this further. For reference, the case number is CPANEL-50991. Follow this article to receive an email notification when a solution is published in the product. 

Workaround

Modify the users configuration file /var/cpanel/users/$user

Change the OWNER= line to

OWNER=root

Execute:

/usr/local/cpanel/scripts/updateuserdomains