Transaction not yet indexed

AM1521xYeV6NSbS2wXQh5XXnZ6DA3mERCnA3Y2ffDiRZ2AJVZXnRbNa8W373VB4w6v5SDaCPpRxCWFM3iRFgSL5

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