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 _fa750fbff03ee8a33f436b55086dae62.app.sydney.fliva.com is not the root of its zone.
Instead, try zone transfer on jkddzztszm.acm-validations.aws .
Instead, try zone transfer on jkddzztszm.acm-validations.aws .