Transaction not yet indexed

Mpmps6eHVDnEtVp6KeAnvsgswunnT42e6yQyLMrTLkMpU2meds3Me4XhqvZCD1U1hounXbQ8y1TqpQ3pVXbRJLw

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