Transaction not yet indexed

NNF51P7Vi9w4QmLYESmAty9TLHomC4xPhDpVj3E8zBS2g8s9pbvS8e2BPuMnYpLCAkQvKeVvUXSb2ePJypCk6ET

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