Transaction not yet indexed

Zum21gkcJm2docLSEJjFJpXMHmXXmSPgrUfr9xV6NCG4tDBJz4DJeYGMNsHxYwjeYV5qxnSt4spbgsJxRqBY2Xe

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