message: [accumulator] fix to work run remove warning log
diff: @@ -352,7 +352,7 @@ impl AccumulatorCache {
  _ => {}
  }
  } else {
  - warn!("{:?} root hash is placeholder!", root_hash);
  + debug!("{:?} root hash is placeholder!", root_hash);
  }
  Ok(cache_map)
  }
  