Transaction not yet indexed

21y51Z6rcHdNuaiqmr21PXfZaREmJktH4mEcvfQTJuk2D1QZCmqTfhEDAQScxb3ABMiFqoJBVKKBQSXLLHWEhbGj

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