diff --git a/mrp_sale_info/models/sale_order_line.py b/mrp_sale_info/models/sale_order_line.py
index 24c43b393..3d66de49e 100644
--- a/mrp_sale_info/models/sale_order_line.py
+++ b/mrp_sale_info/models/sale_order_line.py
@@ -14,4 +14,5 @@ class SaleOrderLine(models.Model):
         column1="line_id",
         column2="production_id",
         string="Manufacturing orders",
+        copy=False,
     )