Because im a newb, i added a voice type to a custom follower in my mod, and started to change a dialogue line or two, now i realized this will affect all npcs with this voice type, how do i revert it back to default without having to start the mod all over again?

Also, if i want to use for example Maledarkelf as a template then rewrite the lines and record the voice for only one character, where would i start?