KNIFE TOP

[Tofua]

Hello guys. This is a KNIFE TOP plugin where the knife kills/hs/deaths are saved in a vault and shown by command /knifetop in MOTD.
It works fine but after killing it saves data then if you change the name and kill again it will add your name once more it's like 2 times with same data. Is there any way to update the player's name in TOP 15 MOTD if he changes his name and is in KNIFE TOP?
What is it right now:
1. Name Knife Kills Knife Deaths Knife Headshots
# Gunman 1 2 3
Now if i change nick and kill someone
1. Name Knife Kills Knife Deaths Knife Headshots
# Changednick 2 2 4
# Gunman 1 2 3
You see it just add the nick once more, i want it to update the current nick in the MOTD instead of adding once more, Thanks!