Transaction not yet indexed

iUM78hmWsoEHosiMrTXBTE8NFBZUGfsUfhynWdeSWUK3MeRAqsmEvrT3m8Cd7BHmGRGaCyHJCiRgcGzJ5ZsCSPq

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