[FIX] don't restrict lot if return product is different

Author: sbejaoui

rma_lot/wizards/stock_return_picking_line.py

@@ -10,5 +10,6 @@ class StockReturnPickingLine(models.TransientModel):
 
     def _prepare_rma_vals(self):
         vals = super()._prepare_rma_vals()
-        vals.update({"lot_id": self.lot_id.id})
+        if not self.rma_operation_id.different_return_product:
+            vals.update({"lot_id": self.lot_id.id})
         return vals

rma_sale_lot/wizards/sale_order_line_rma_wizard.py

@@ -19,5 +19,6 @@ def _compute_lots_visible(self):
     def _prepare_rma_values(self):
         self.ensure_one()
         values = super()._prepare_rma_values()
-        values["lot_id"] = self.lot_id.id
+        if not self.operation_id.different_return_product:
+            values["lot_id"] = self.lot_id.id
         return values