Transaction not yet indexed

AmBRdWZApKWB2nkcEPVMSqofdsnQCmpCTV7nYySUs8MuBLEHqiS2cG2jcpW21Xi8jcGPiXEi3ft2nUYnudTM63U

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