Transaction not yet indexed

21z51uNFUCdwA4L43ZjMYTiQBuFU7RS88dobu1U52LHmosTmQUPbs3DvL2eRcXbApqLswQD2mAFnXNLQ9dMX7J6k

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