Transaction not yet indexed

2Kc51MJ7aZ9TA5YnQf2anNcTnKZebVvFG6cCAMhbuvShr1jGnw53RvFWzafFT5sA1JtkBf1U7a6kGPAMZs4mR57y

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