Transaction not yet indexed

1mmStw8eTK9PRoYkGWAWcdrAjoK3Dj6YQF5Z9hdpznJDqS2AB4HxTL7RTXtLUSbMKbTGupJHAAx2x9rwXpwAY5Y

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