Allegedly this is an official statement from Nicki about her management. Read below -

“By now, everyone should now that I am really strict when it comes to my representation. I had sympathy for Sean however I feel as if I haven’t gotten the guidance the manager is supposed to give his client. Personally, I feel like I’m being managed by mother. Even if you play the smallest role on my team, I wish to see progress. I’d like to thank him for everything he has done for me; for taking me under his wing. I wish him the best with repping Rick [Ross]. But now that my album is about to drop, its time to get serious and stop playing games. If I could turn back time…I wouldn’t have made the decision to let Troy go.”
Diddy has been replaced by Benny Medina.

Via VladTV/ Hip Hop DX /MTV

Note: Not sure how true this is no source was mentioned or linked. Awaiting confirmation..

Update: Nicki tweeted this…still no word on Diddy tho?

Update #2

Miss Info has just informed everyone that the statement is a fake