Transaction not yet indexed

PG51vVft42Cq4kWYvTQatHBKPCpgs3NayZRQT4LiqeJuZ8vmkY3ccYcDNrcf5CLqnL6DMKQ1m1dAyoyohj9o721

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