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 server-0.ipv6-internal.sin02-sin03.ds.network is not the root of its zone.
Instead, try zone transfer on ipv6-internal.sin02-sin03.ds.network .
Instead, try zone transfer on ipv6-internal.sin02-sin03.ds.network .