Transaction not yet indexed

AmMd9KgtmsPWmnuXyoub3Lvp38P6d7WV1Pd7kLm9bRfnNtot7BJ18JwbuY5w7B64qXMtqY8U2uxaNRtwjMLRs5g

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