Changes since SOA version
IXFR is a zone transfer request that returns changes since a specific SOA version. Enter the SOA version to request changes since then.
Not an apex domain
The domain sender169.mgnr-track.fon.bet is not the root of its zone.
Instead, try zone transfer on mgnr-track.fon.bet .
Instead, try zone transfer on mgnr-track.fon.bet .