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 ns1.vtv-preprod.vodafone.al is not the root of its zone.
Instead, try zone transfer on vtv-preprod.vodafone.al .
Instead, try zone transfer on vtv-preprod.vodafone.al .