The task Update PowerDns server inserts A records for the nameservers into PowerDNS database with empty content. The following messages can be found in
Jan 25 12:29:41.935 : DBG [task:103663709:14015 1:24862:7f5710dfa700 PowerDns ]: [ DNSManagement::PowerDns::PgConnection::executeStatement] Statement: SELECT id FROM records WHERE domain_id = $1 AND name = $2 AND type = $3 AND content = $4, parameters: 381670 'ns.example.com' 'A' ''
example.com is a branding domain.
One of the name servers was deleted from OA. In combination with the software issue #POA-112746, this leads to the situation, when a record of a name server corresponds to the IP address of the deleted name server.
The software issue #POA-112746 was permanently fixed in OA 7.3.
In order to apply a workaround, please contact Odin Technical Support.