Hey guys. I'm at the end of my rope here. My old Jerma recently had his partner die, and I thought he looked lonely so I got him a new Jerma friend, but new Jerma turned out to be very territorial and treats my old Jerma extremely aggressive - how do I so

Hey guys. I'm at the end of my rope here. My old Jerma recently had his partner die, and I thought he looked lonely so I got him a new Jerma friend, but new Jerma turned out to be very territorial and treats my old Jerma extremely aggressive - how do I so