Recently I upgraded my NAS to 14.2 via slackpkg install-new and upgrade-all and ran into a few issues that required a little manual mending.

Istall-new will install all the new packages but will leave some of the older ones that may cause problems, apart from some minor issues with duplicate libs
udev and eudev will conflict: you need to manually remove the older udev and reinstall eudev to get rid of the older udev package.

I've a minimal install (just a few bits and pieces to get nfs and a little more working from miniroot) so I manually checked off a lot of the stuff install-new wanted to install. In doing so I accidentally unchecked rpcbind that replaces portmap. Even if you let slackpkg install the new rpcbind you'll get the older portmap package left installed (like udev with some files conflicting with the newer package) the quickest workaround I can think of is to remove the older package and reinstall the newer.

There's probably other packages that might need a little attention that I missed on my minimal installs.

Did you try running in the following order these commands?

The old packages should have been removed by "slackpkg clean-system".

Thanks mralk3, I'm aware of that procedure (it's in the man page) but I've some stuff I compile myself so I don't like running clean-system but I suppose that it would take care of the packages removed from the distro (like udev and portmapper) but since they have conflicting files/links it would still leave your system in an inconsistent state ... you would still need to reinstall eudev and rpcbind.

I think new-config runs automatically after upgrade-all as you get prompted for action on .new config files even old ones hanging around.

I wasn't asking for any help ... just wanted to warn others of the possible issues but thanks anyway