PFCG menu entry with blank transaction

Hello,

While going through some of the roles, I found in PFCG role menu there are some entries in transaction list "- transaction". When i click on it, it says the transaction does not exist. If the transaction has been deleted, than this entry should also does not exist. Maybe this is a common thing, but i am unable to understand it. Please can anyone suggest.

Regards,

Sanjay