Transaction not yet indexed

MkZCPPKBZLoCZECSzhe5ZEVuPsKcS8v5kK7e6zHQa8RWcuPCLUB1eFfY5WH1VMssKKtBwuw8kFF3zRmrSBQgcjE

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