My best friend is a one upper. She suffered from Queen Bee Syndrome for a long time. She moved to a city where she didn't know anyone and that snapped her out of it. Sometimes, she still tries to pull the "I know EVERYTHING and you can't possibly tell me anything I don't already know or do something I haven't already accomplished". It used to drive me insane (we're not in competition with each other, but it's still really annoying).
I started calling her out. When I would talk about running and she launches into these imaginary glory days of high school cross country, I will remind her that I was there and KNOW that she was (and still is) a chain smoker and she can't run to the end of the block these days. In fact, she did cross country for like, one semester and ditched half the time

I think she forgets how long I've known her

Yes, I'm happy that I made it for 10 whole minutes on the treadmill. Just be supportive, you know?
Sometimes people forget who they're talking to.
ETA: I would like to add that this girl is a very good friend to me, but this is a tribute to the kind of personality she has. I had another very close friend who was so insecure and jealous over everything that she could not acknowledge ANYTHING good that happened to me. Ever. Internship at the Grammys? She never mentioned it. Lost a lot of weight? Didn't notice.
That girl was eventually dropped like the bad habit she was.