diff --git a/tiramisu/option/masterslave.py b/tiramisu/option/masterslave.py
index edb798a..69e391f 100644
--- a/tiramisu/option/masterslave.py
+++ b/tiramisu/option/masterslave.py
@@ -229,7 +229,8 @@ class MasterSlaves(object):
                     else:
                         return value
                 else:
-                    multi.append(value, setitem=False, force=True, validate=validate)
+                    multi.append(value, setitem=False, force=True, validate=validate,
+                                 force_permissive=force_permissive)
                     one_has_value = True
             if not one_has_value:
                 #raise last err
diff --git a/tiramisu/setting.py b/tiramisu/setting.py
index 0eb6cf0..6588de2 100644
--- a/tiramisu/setting.py
+++ b/tiramisu/setting.py
@@ -427,8 +427,6 @@ class Settings(object):
         if not force:
             forbidden_properties = forbidden_set_properties & properties
             if forbidden_properties:
-                print "super ..."
-                raise Exception('pouet')
                 raise ConfigError(_('cannot add those properties: {0}').format(
                     ' '.join(forbidden_properties)))
         self._p_.setproperties(path, properties)