While playing Rainmaker in Anarchy Battle, I noticed I'd won medals for both #1 Score Booster and Record-Score Setter in a single round. Presumably the Score Booster medal is for boosting the team score, so what is the Record-Score Setter medal for?

[![#1 Score Booster and Record-Score Setter in one round][1]][1]


  [1]: https://i.sstatic.net/NUdKs.jpg