Change LOD from 0 to 1

Henlo it's question time again 

I already stumbled over that problem a couple of times 
and now I'm having enough 

is there a way to make a LOD 0 to a LOD 1?
I'm usually just doing mesh modifications 
and they usually already have the LOD's 

so I start to modify the LOD 0 first 
and then I'm doing all the same work with the LOD 1 Mesh of that object 
and so on 

isn't there an easier way? 
I don't wanna start all over again