>Version 1.1.2<
Removed the option to change the attribution of content created by deleted users due to the usage of deprecated code in the original codebase.
If you want to retain this option, do not upgrade and accept the error message in your XenForo Server Error Log. It can be disregarded safely.
We recommend everyone to upgrade to the PRO version of this add-on as it uses a much more modern codebase and offers a lot of additional features.