docs: def before_insert(mapper, conn, target):
          """event.listen method for Sqlalchemy to set the seqience_id for this
          object and create an ObjectNumber value for the id"""
          if target.sequence_id is None:
              from ambry.orm.exc import DatabaseError
              raise DatabaseError('Must have sequence id before insertion')
  
          Table.before_update(mapper, conn, target)