(J J and his anti prequel boner)
Bullshit!
You tell me how it makes sense for a second that she’d have that flag in her possession. And don’t try and justify it with some other piece of media explaining the flag’s origin. In the context of the film, it’s Anakin’s flag and nothing else. I think it’s a change that makes sense.
…You mean like trying to justify how she randomly has Anakin’s lightsaber after it fell out of a vent shaft into a gas planet some 30-odd years prior?
At least Anakin’s flag still being around is plausible.