Comment # 1 on bug 966634 from Wolfgang Bauer

Known problem.

The main issue is that kwalletmanager and kwalletmanager5 cannot be installed
at the same time.

And until recently some important applications that need kwallet were still
KDE4 based (kdepim e.g.) and some still are, like kopete or konqueror.

*** This bug has been marked as a duplicate of bug 954371 ***