Help Reducing Job Level Using Sql

[Checkmate]

Hi.. rAthena Community..

 

Well.. like i mentioned above,im not got in sql but there is any cmd to use to downgrade all player job level?..?
In my server  3rdjob was 120/70

I want to make it 150/50

The thing i need to change was max level from 120 into 150

but for the job level how im gonna downgrade from 70 into 50.Cuz all of them were already 120/70..

Thanks