Transaction not yet indexed

6621yATZE3zaTbMPdXE28MoPnCUCKUJKSoWkqQPDLoMPMAq9A6eGaEwQs36x5dqZMgZAuhA2WYxmDh1fgJNJ64gJ

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