Don't trigger signals when we add an object through a permission check

apps/permission/models.py

@@ -58,7 +58,7 @@ class InstancedPermission:
                     # Force insertion, no data verification, no trigger
                     obj._force_save = True
                     # We don't want to trigger any signal (log, ...)
-                    obj.no_signal = True
+                    obj._no_signal = True
                     Model.save(obj, force_insert=True)
                     ret = self.model.model_class().objects.filter(self.query & Q(pk=0)).exists()
                     # Delete testing object