Accidentally installed a non clustered master server to a clustered environment

Hello ,

I have 2 new server witch are clustered (VCS cluster ) , I Intended to install NB clustered master serve 7.6.0.1 on both of them but when installing on first node  I accidentally answered Yes when asking me :
<name> the master server? [y, n] (y) 

At the installation script , I tried to remove the Netbackup completely following the instruction at the installation guide and tried to reinstall but at the end of the installation script it assumes that my server is the master server and finishes the instillation .

PLEASE HELP 

OS VER : soalris 10 x 86