Transaction not yet indexed

51REXD1u5tA36aaLAuNxnovLVu4SpXLPZSXN2k8TPEMGyyfpjbbR21rSgLk4PCAsUPF5eGTC6nUgiED4CxfWQ9Ls

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