Transaction not yet indexed

MZnk6tkduWcva1UsC9RFxzqsUmGL62fyZuSqtuPXyW6HNqE6FeTg2JAJBi6HD8CjaKa7zr7PQLsvUBSdNLZ6Tiv

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