If you look closely .. it can't find audacity-data (which is required by audacity) in the PPA.
Check the PPA:https://launchpad.net/~audacity-team/+archive/daily
and you'll see it no longer contains audacity-data .. don't ask me why, ask them.
Your only option is probably to "ppa-purge" that PPA and either look for a different one, or go back to the default version of audacity .. or accept the partial upgrade.
if you want to stick with your current version of audacity .. but don't want to keep getting warned .. disable that PPA.
As it's a "daily" PPA, there's a good chance they'll notice the error and put audacity-data back pretty soon .. so I'd just wait.
Have you tried just clicking the "Check" button in Update Manager ?