Lion Server：Lion Server v10.7.3 にアップデートした後に Server アプリでプロファイルマネージャの設定を表示できない

timestamp) pm.example.com ProfileManager[8023] : ServermgrDevicemgr: Exception caught undefined method `delete' for nil:NilClass: / usr /share/devicemgr/backend/app/models/interface_knob_set.rb:81:in `generate_payload_hash' / usr /share/devicemgr/backend/ lib /profile_manager.rb:506:in `generate_profile_section_hash' / usr /share/devicemgr/backend/ lib /profile_manager.rb:448:in `generate_profile' / usr /share/devicemgr/backend/vendor/rails/activerecord/ lib /active_record/associations/association...

https://support.apple.com/ja-jp/101116