Transaction not yet indexed

Sn91JzEAoMBsafdu7teroFc7hepGBRB2GtxDUsz6dwoMXAWdvMFa9kT7v6YmuQUx9gVcTaHHGk8vNNC2MbvasN9

The transaction signature is valid but not yet indexed by this RPC node, or the transaction failed before inclusion.