I got this error when i setup powerdns superslave in debian using sqlite3 backend.
The condition to get the superslave working.

  • The supermaster must carry a SOA record for the notified domain.
  • The supermaster IP must be present in the ‘supermaster’ table.
  • The set of NS records for the domain, as retrieved by the slave from the supermaster,
    must include the nameserver that goes with the IP address in the supermaster table.

A very usefull command to test if the setup is working. To send the notification to the slave and

#pdns_control notify mydomain.com

To request for supermasters zone

#pdns_control retrieve mydomain.com

Related
PDNS slave operation