Transaction not yet indexed

MpkuuGFKBKaR9APiXqoDQnqEhLQX4YLQAi4e8KZX7VrKmJarAhqChD2WwtJoJp1KviaPf9i4U9J2SpYms3VuY1J

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