Comment 48 for bug 857828

(That said, getting prompted again and again with no way to opt out would also be an annoyance, so I guess distros looking for a quick fix should use my patch from comment #16.)

By the way, the commit which caused this regression is this commit by David Faure:
https://projects.kde.org/projects/kde/kdepim-runtime/repository/revisions/60f8c01542f86bd04cafd68b91c2f609d73d4aa2
which added the check preventing running the migration manually when it was already run.