Transaction not yet indexed

AmUNxgW5gsJP5aMe7ARYbn4G2HtYD9dXxu7ke9ZjTzSW6rHMeNxqkAPGoX5sChwjjaPXdRf4McZ7VzdKyJc6aSg

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