Transaction not yet indexed

MMmMpbPXU9oum4NGnzWK8ffRWL3e7b3QhsnmPdpFy5GKeS8TwqMh52RgWR2nWoDc9RwBcpNEt9mAuAWYBs9rjb6

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