Transaction not yet indexed

ymUB5ak9kbSx2Vw3YEme2WLFHe59Z88VTQzPM1e5gRpu8P6iqQJDq7ZLuBo2yny4SPjuGzHMYV2dNJr8mkCi8Rh

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