Don't delete object when checking an add permission: this is useless since we...

Don't delete object when checking an add permission: this is useless since we rollback to the initial DB state

apps/permission/models.py

@@ -45,6 +45,7 @@ class InstancedPermission:
                 with transaction.atomic():
                     sid = transaction.savepoint()
                     for o in self.model.model_class().objects.filter(pk=0).all():
+                        o._no_signal = True
                         o._force_delete = True
                         Model.delete(o)
                         # An object with pk 0 wouldn't deleted. That's not normal, we alert admins.
@@ -62,10 +63,6 @@ class InstancedPermission:
                     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
-                    obj._no_signal = True
-                    obj._force_delete = True
-                    Model.delete(obj)
                     transaction.savepoint_rollback(sid)
 
                 return ret