diff --git a/sale.py b/sale.py
index bc85fe4..60d3750 100644
--- a/sale.py
+++ b/sale.py
@@ -399,7 +399,7 @@ class Sale(metaclass=PoolMeta):
 
         user = User(ctx.get('user'))
         shop = Shop(args['shop'])
-        attribs_del = ['id', 'amount', 'unit_price_w_tax', 'total_amount']
+        attribs_del = ['id', 'amount', 'unit_price_w_tax', 'total_amount', 'set_delivery_fee', 'delivery_fee']
         lines = args['lines']
         nested_values = None
         for line in lines: