Can I delete NB-Java.tar.gz file under client folder in netbackup client

Hi All;

I have a  netbackup client space issue. it uses 94% I checked it has 4 NB-Java.tar.gz files  under /usr/openv/netbackup/client/Linux/. Can I remove them? Thank you.

/usr/openv/netbackup/client/Linux/SuSE2.6.16/NB-Java.tar.gz
/usr/openv/netbackup/client/Linux/RedHat2.6.18/NB-Java.tar.gz
/usr/openv/netbackup/client/Linux/IBMzSeriesSuSE2.6.16/NB-Java.tar.gz
/usr/openv/netbackup/client/Linux/Debian2.6.18/NB-Java.tar.gz