Transaction not yet indexed

Uc6mkjVvJAdZK8eAtoWEx5QwdBNirUS99gFi8yg4EooGN8wvS66bdLesHFwMXvVYmMV2oF93rTDtKo1TRJm5Ls9

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