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  File "/home/hasan/documents/odoo/odoo-14.0/odoo/models.py", line 6310, in onchange
    record._onchange_eval(name, field_onchange[name], result)
  File "/home/hasan/documents/odoo/odoo-14.0/odoo/models.py", line 6052, in _onchange_eval
    method_res = method(self)
  File "/home/hasan/documents/odoo/odoo-14.0/dm_project/core/equip3_purchase_other_operation/models/purchase_request.py", line 526, in onchange_price_unit
    self.order_id._amount_all()
  File "/home/hasan/documents/odoo/odoo-14.0/dm_project/core/equip3_purchase_operation/models/purchase_order.py", line 2455, in _amount_all
    gross_total = sum(record.order_line.mapped('gross_total'))
  File "/home/hasan/documents/odoo/odoo-14.0/odoo/models.py", line 5308, in mapped
    recs = recs._fields[name].mapped(recs)
  File "/home/hasan/documents/odoo/odoo-14.0/odoo/fields.py", line 1109, in mapped
    self.__get__(first(remaining), type(remaining))
  File "/home/hasan/documents/odoo/odoo-14.0/odoo/fields.py", line 1042, in __get__
    self.compute_value(recs)
  File "/home/hasan/documents/odoo/odoo-14.0/odoo/fields.py", line 1198, in compute_value
    records._compute_field_value(self)
  File "/home/hasan/documents/odoo/odoo-14.0/odoo/models.py", line 4109, in _compute_field_value
    odoo.fields.determine(field.compute, self)
  File "/home/hasan/documents/odoo/odoo-14.0/odoo/fields.py", line 82, in determine
    return needle(*args)
  File "/home/hasan/documents/odoo/odoo-14.0/dm_project/core/equip3_purchase_operation/models/purchase_order.py", line 2630, in _compute_amount
    traceback.print_stack()