synchronized void removeExceptionsOlderThan(long v) {
    mergeBitSet();
    if (exceptions != null) {
      for (Iterator<RVVException> it = exceptions.iterator(); it.hasNext();) {
        RVVException e = it.next();
        if (e.nextVersion <= v) {
          it.remove();
        }
      }
      if (exceptions.isEmpty()) {
        exceptions = null;
      }
    }
  }
Add an exception that is older than this.bitSetVersion.
geode-core/src/main/java/org/apache/geode/internal/cache/versions/RegionVersionHolder.java