Transaction not yet indexed

21D6nwJrmmSCNv93pnwuwxG2R5Tv1N9qzQowTAdXVRKPj275mRMAMibs1B1ir5mQ8fzHst8ShSWS4RN3C4KJfuvp

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