Transaction not yet indexed

21NkDNWDKbNApB9B2nE1TWFa6xm3bu14FJzjvvofj876iPvpmGci7AV4sFT26VYRK4TiZeeEZPA1FGak3wFMsS1n

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