Transaction not yet indexed

AmMM6DXfmebtZyeksH3MWrr7v4rtWBNv1jBvwb6kv9ZK2kDPk7f7Z1dno7v7ppo5b4RkLWxLbQpPA3Jh3hpPfN9

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