If we delete a class from the class manager and immediately delete it from the trash, an error is displayed and the deletion is not possible. Because after deleting we have to save first and then delete from the trash. So I’m not sure if this is more of a bug or a feature request. But I think the current method is something that many users will definitely encounter. Especially new users. They delete a class from the trash, but it is not deleted. The error is displayed and it is not clear why.