Transaction not yet indexed

d21Hum96P4Haf2znXCnGcp2GTKBDnXYQotb2beN4QFt1ugaKGUWPWQoGjGQLcmGqq4Qwk2iC3HzcZ3zfnLBTTM1

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