Transaction not yet indexed

Nk6kJaZfcVYwwtLY3JdpSrwSprGMzW4SpCvqB2ZoEhBwFrZ8jCeWbdZB61ubZBh1K6mcT5TRAHpntAdPY6cGHsF

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