Account creation error: The domain "domain.tld" already exists in the user data.

Symptoms

When attempting to create or restore an account, you encounter an error similar to the following.

Failed to create the account: (XID 6shq2n) The domain “domain.tld” already exists in the userdata.

Description

This error frequently occurs after a domain has been removed from the server, but an entry for it still exists in the userdatadomains file.

Workaround

1. Access the server's command line as the 'root' user via SSH or "Terminal" in WHM.
2. Backup the userdatadomains file.

   cp -av /etc/userdatadomains{,.$(date +%s)}

3. Run the updateuserdatacache script.

   /scripts/updateuserdatacache --force

Additional resources

How to locate 'cruft' left over from a removed domain

How to locate 'cruft' left over from a partially removed account