CPU Trades Rule Issue

I control the Raptors and I had accepted a trade offer from the cpu-controlled Nuggets where I received Afflalo for Barbosa and a draft pick. I've tried three times to reverse the trade as per your instructions, but the Nugs won't accept it. Plus Barbosa just signed a 6-year extension with them. Just thought I'd drop this knowledge in case anyone was having similar difficulties. I don't see how I can fix it, hopefully whoever wants the Nuggets likes Barbosa.

well i've seen similar problems with the rockets/bobcats trade, so they will have to stay but no more trading with CPU