DCPromo was unable to remove DNS delegations from the parent zone: "%1". This could be because of one of the following reasons: ...

DCPromo was unable to remove DNS delegations from the parent zone: "%1". This could be because of one of the following reasons: you do not have permission to do so, the zone is hosted by a server that does not run Windows, no server hosting this zone can be contacted or the zone does not exist.

If the zone does exist, you should delete DNS delegations in the parent zone targeting this domain controller. To do so, contact an administrator who is responsible for the DNS zone: "%1".
The error was: