Creating an instance calls ``_update_types``, which will create the instance's type hierarchy if it doesn't exist. There's no way to tell whether the query will have any effect or not (and there's a comment to that affect here https://github.com/onefinestay/kaiso/blob/5666ea9e433dab8d3f6d7f2e98c068577ae0201c/kaiso/persistence.py#L306)