Transaction not yet indexed

MkS1yQXPnEqBFAkVjY1mfAXZsViBHcS6QXu9Xw8zUUZ2T4FmKvq2QSNRS64jsDckkVfHdgHMqwVKRa3T3KxzcP1

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