code: def update_id(self, sequence_id=None):
          
          from ..identity import GeneralNumber1
  
          if sequence_id:
              self.sequence_id = sequence_id
  
          self.vid = str(GeneralNumber1('T', self.d_vid, self.sequence_id))
docs: Alter the sequence id, and all of the names and ids derived from it. This
          often needs to be don after an IntegrityError in a multiprocessing run