• A 'member of band' relationship is created between two artists.
• An edit is entered to add a 'lead member' attribute to the relationship. The edit is open.
• An edit is entered to change the relationship type to 'performs as'. This edit is automatically applied.
• ModBot attempts to close the first edit by adding the 'lead member' attribute to the 'performs as' relationship, and fails.

Instead, because the context of the relationship has changed so much, the edit should fail.