Modifying kerning groups name without losing values

Hi, I have a kerning group for V that takes the values of W. I now realise that the values of W are bit too loose for the V and I want them not to be in the same group.
Or is there another way to changes the values of the V without altering the values of the W?
cheers
Seb

The tutorial at this link should tell you how to do it. Pay particular attention to the part about Groups and the lock/unlock feature.
https://glyphsapp.com/tutorials/kerning