Yeah probably not a great move having your rental reported to the bureaus if you already had good credit; that’s more of a move for people trying to build credit. However if you have them stop, it won’t remove what they’ve already reported, so I think it might be too late to do anything about it. Best thing to do is just move forward from here; age of credit won’t affect your score as badly as missed payments, so your score will be fine down the road. Do you have any credit cards currently? If not I’d recommend getting one and keeping it open indefinitely to help with the age thing. Of course, as you go through life you’ll add new credit as time goes on, always affecting the age of credit. I wouldn’t worry about it too much.