Did anyone change their status D-4 to D-2?

Hello, I am currently studying at a Language School, I have TOPIK 4 and i'm currently at Level 5 and it is my last semester. I got accepted into a Master's Program in Korea so I will apply for a Change of Status. But I'm a bit worried about my grades, I was wondering if anyone knows that if i fail because of poor grades does it affects my application?