code: def sync_status(self, status):
          
          if self.status == status:
              return True
  
          try:
              with db.session.begin_nested():
                  self.status = status
                  db.session.add(self)
          except SQLAlchemyError:
              logger.exception("Failed to sync status {0}.".format(status),
                               extra=dict(pid=self))
              raise
          logger.info("Synced PID status to {0}.".format(status),
                      extra=dict(pid=self))
          return True
docs: Synchronize persistent identifier status.
  
          Used when the provider uses an external service, which might have been
          modified outside of our system.
  
          :param status: The new status to set.
          :returns: `True` if the PID is successfully sync.