diff --git a/tiramisu/value.py b/tiramisu/value.py
index c89fc9e..3aacdbf 100644
--- a/tiramisu/value.py
+++ b/tiramisu/value.py
@@ -325,9 +325,8 @@ class Values(object):
         doption_bag = option_bag.copy()
         config_bag = option_bag.config_bag.copy()
         config_bag.context = meta
-        config_bag.remove_validation()
+        config_bag.unrestraint()
         doption_bag.config_bag = config_bag
-        doption_bag.properties = frozenset()
         meta_option_bag = meta.cfgimpl_get_values().getowner(doption_bag,
                                                              only_default=True)
         if meta_option_bag == owners.default: