Transaction not yet indexed

21Ckf3mKgtZeJQq4AttwM6MWVGKFLow7sPn5bQ7vddK7Ddbp6DbYYHJKxAnSYNefLZgrfuUCHbsW7ZGyj6dPQppN

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