diff --git a/sale_product_pack/models/sale_order.py b/sale_product_pack/models/sale_order.py
index 00f518fe..ea748e21 100644
--- a/sale_product_pack/models/sale_order.py
+++ b/sale_product_pack/models/sale_order.py
@@ -60,12 +60,4 @@ def write(self, vals):
 
     def _get_update_prices_lines(self):
         res = super()._get_update_prices_lines()
-        result = self.order_line.browse()
-        index = 0
-        while index < len(res):
-            line = res[index]
-            result |= line
-            index += 1
-            if line.product_id.pack_ok and line.pack_type == "detailed":
-                index += len(line.product_id.pack_line_ids)
-        return result
+        return res.filtered(lambda line: not line.pack_parent_line_id)