Look like authManager->update() not working

[prawee]

What steps will reproduce the problem?

i'm want to change type of role to permission Exp. from permission to role case

$auth = Yii::$app->authManager;
$roleName = $auth->getRole($model->name);
$permission = $auth->createPermission($model->name);
$permission->description = $model->description;
$auth->update($roleName,$permission);

don't error but data not change.

Q	A
Yii version	2.0.11
Yii MongoDB version	^2.1
MongoDB server version	3.4.1
PHP version	7.0.15
Operating system	macOs 10.12.3

[klimov-paul]

Unable to reproduce. Update is covered by unit test, which passes successfully: https://github.com/yiisoft/yii2-mongodb/blob/master/tests/rbac/MongoDbManagerTest.php#L115