The correct answer to this open question is the following.
Although you did not attach options for this question we can say the following.
The most harmful repercussion from her choice could be that she presented a topic that she is not very familiar with, so she could sound dubious, insecure, and her speech won't be powerful enough to convince the audience.
Paula did not trust herself and by changing the topic of her speech she tried to make other people feel good when she had to be the first to feel comfortable with her original topic, the one that she felt good about 90's music.
So this could be a lesson for all of us. Never doubt your preparation and trust yourself. If there is a topic you like, you know about, and you like to share, go out and deliver it right.