Please don’t! Unless the db is corrupted don’t execute such command!
@asl you probably have only metadata issues and you need to reconfigure the software center, just execute:
cat <<EOF > /etc/nethserver/pkginfo.conf
# This is the list of YUM repositories that have their groups listed
# on the Software Center UI page, through the pkginfo helper.
# One repository identifier per line
yum clean all
Feel free to contact Nethesis support if you still have any problem