I suggested the moment these Darmian rumors and gentlemen agreement with Parma came up, that we promised Parma to buy him once they bring him back to Italy and use him for an year. They also needed to buy Karamoh from us (plusvalenza). That's something I came up with. They make small profit since they bought Darmian for 1.5m year ago. We were rumored to Darmian also in 2019 but he ended up at Parma.
Farfetched but only thing which came to my mind. We didn't want to bring Darmian in because he hadn't player hardly at all so we used Parma for getting him back to the pitch. What's still mystery is why Darmian? He isn't a particularly good player to begin with.