I just had the following error when trying to upgrade Airwave from 7.7.13 --> 8.0.4.1.
package aw-Pound-2.7c-1.el6.x86_64 (which is newer than aw-Pound-2.6-7.el6.x86_64) is already installed
make[2]: *** [pound] Error 2
make[2]: Leaving directory `/root/svn/mercury/src'
make[1]: *** [src_install] Error 2
make[1]: Leaving directory `/root/svn/mercury'
make: *** [upgrade] Error 2
make: Leaving directory `/root/svn/mercury'
Stopping Pound: [ OK ]
tsdb-server: unrecognized service
Upgrade aborted.
I found this, but wondering if it is still relevant? link