Transaction not yet indexed

MfkNNeQwgJuqdJfP3UmdYp1aAcmEkKfzz7CYNgbmqD1RpZgyQVZmdEtUTBmCyhcfFWyCkJt4BiEh2fcZoz2CgRt

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