[fix] remove self parameter

models/stock_move.py

@@ -8,7 +8,7 @@ class StockMove(models.Model):
     _inherit = 'stock.move'
 
     def _prepare_move_line_vals(self, quantity=None, reserved_quant=None):
-        vals = super()._prepare_move_line_vals(self, quantity, reserved_quant)
+        vals = super()._prepare_move_line_vals(quantity, reserved_quant)
         if reserved_quant:
             vals = dict(
                 vals,