Im pretty sure that the last thing that this mod misses, i strongly recommend you to use old level-up sound so it will not conflict with newer one. By doing this way you save canonical meaning of both actions. Like:
1. Newer sound - Is for leveling skills
2. Older sound - For leveling traits

https://psteamcommunity.yuanyoumao.com/sharedfiles/filedetails/?id=2850826422&searchtext=Old+Level+Up