protected void invalidateEntry(EntryEventImpl event, RegionEntry re, int oldSize)
      throws RegionClearedException {
    processVersionTag(re, event);
    event.putExistingEntry(_getOwner(), re);
    EntryLogger.logInvalidate(event);
    _getOwner().recordEvent(event);
    _getOwner().updateSizeOnPut(event.getKey(), oldSize, event.getNewValueBucketSize());
  }
If an entry is already invalid we still want to perform a conflict check, update
the entry's version stamp and invoke listeners.
geode-core/src/main/java/org/apache/geode/internal/cache/AbstractRegionMap.java