Apartment Advice

Location: Ohio

Me and my partner recently had back and forth with our apartment complex. During the back and forth they attached someone that was not on our lease to a email thread discussing much of our private information.

When we brought this up to the leasing office. They offered us a $40 discount in one month of rent if we signed a document that after reading basically states we will not sue them for any known or unknown reasons. This all just felt really shady and we are wondering how we should precede with this?