Sometimes in team create after stopping a test session, some attributes that are set to a model during runtime will mysteriously show up under every single instance.
These attributes cannot be modified in anyway as they appear to be in a broken state.
Addendum: Seems like running and stopping a new session will make it go away.
Are you able to reproduce this consistently (or with some consistency)? I vaguely remember a report of this in the past but we weren’t able to replicate it ourselves.