diff --git a/modules/sale_subscription_asset/sale.py b/modules/sale_subscription_asset/sale.py
index 64d18bee84..9d9e58a779 100644
--- a/modules/sale_subscription_asset/sale.py
+++ b/modules/sale_subscription_asset/sale.py
@@ -113,7 +113,7 @@ class SubscriptionLine(metaclass=PoolMeta):
             default = {}
         else:
             default = default.copy()
-        default.setdefault('lot')
+        default.setdefault('asset_lot')
         return super(SubscriptionLine, cls).copy(lines, default)
 
     @classmethod