> warning: /var/tmp/rpm-xfer.ap5B2j: V3 DSA signature: NOKEY, key ID 82fd17b2
> Preparing...                ###########################################
> [100%]
>          package yum-conf-302-2.SL (which is newer than
> yum-conf-30rolling-1.SL) is already installed

by the standard rpm version comparison 302 > 30 so 302-2 > 30rolling-1
there is no good way to avoid this without bumping the epoch in the 30rolling
version...