Transaction not yet indexed

Nk6tMJ3151yBgAi75dh4dJeniqrf7HDvQah23P7yRET1SEmD6dPZR1h9hcsjSe68fUT8JMT71U4whnf1HEV5Mb8

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