message: Downgrade logs to WARN (from ERROR).
diff: @@ -648,12 +648,12 @@ impl<I: NodeIdT, C: Context + 'static> HighwayProtocol<I, C> {
  // We're ahead.
  match state.panorama().get(vid) {
  None => {
  - error!(?vid, "received a request for non-existing validator");
  + warn!(?vid, "received a request for non-existing validator");
  vec![]
  }
  Some(observation) => match observation {
  Observation::None | Observation::Faulty => {
  - error!(
  + warn!(
  ?vid,
  our_next_seq,
  ?observation,
  