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You should read "Upgrading to newer versions of Roundup"
before upgrading.  In particular, section "Migrating from
0.7.1 to 0.8.0": "You *must* fully uninstall previous
Roundup version before installing Roundup 0.8.0. If you
don't do that, roundup-admin install command may fail to
function properly."

Package uninstall is a duty of your package manager - that's
not the thing Roundup can do itself.