code: def lastPrePrepareSeqNo(self, n):
          
          if n > self._lastPrePrepareSeqNo:
              self._lastPrePrepareSeqNo = n
          else:
              self.logger.debug(
                  '{} cannot set lastPrePrepareSeqNo to {} as its '
                  'already {}'.format(
                      self, n, self._lastPrePrepareSeqNo))
docs: This will _lastPrePrepareSeqNo to values greater than its previous
          values else it will not. To forcefully override as in case of `revert`,
          directly set `self._lastPrePrepareSeqNo`