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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def migrateUp(self):
 """ Recreate the hooks in the site store to trigger this SubScheduler. """

        te = self.store.findFirst(TimedEvent, sort=TimedEvent.time.descending)
        if te is not None:
            self._transientSchedule(te.time, None)