@Override
    public boolean prefersOldSerialized() {
      return true;
    }
When an event is discarded because of an attempt to overwrite a more recent change we still
need to deliver that event to clients. Clients can then perform their own concurrency checks
on the event.
geode-core/src/main/java/org/apache/geode/internal/cache/DistributedCacheOperation.java