Transaction not yet indexed

MmnBtuEU1zpCtmTs1igqF3PLhSpDXRSdZAZVgr1m9a6eUJXRhUUqDGXyhCqPP8nnEPRefKcz5pSQANKqw2kQXQm

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