Transaction not yet indexed

ngpZ5pMYZjtYmn6Ua1ZE6XD1vbqEjyJ72xV7bc7Amk8dW4yykYfudbyUC27Ltcp4KffNETBmf9Q2XaPazY4nQ31

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