I am trying to fetch a value from a custom field in sale order line to the automatically generated purchase order. What I did is editing some methods in sale.py, procurement.py, stock_move.py, stock .py. Then I get this error:

 values.setdefault('company_id', self.env['res.company']._company_default_get('procurement.group'))

ValueError: <class 'AttributeError'>: "'str' object has no attribute 'setdefault'" while evaluating

'model.run_scheduler(True)'