Transaction not yet indexed

RK51gPxeMYXuELhhBoNXcEiFJj6ha1FnGgWxFojSrg3ukKCjZfr186wJAM1MgBQXWwpRdj4eUwKiFXbfcP6tr2W

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