---
fixes:
  - |
    [`bug 1727099 <https://bugs.launchpad.net/keystone/+bug/1727099>`_]
    When users try to changes their password, the total number which
    includes the new password should not be greater or equal to the
    ``unique_last_password_count`` config options. But the help and error
    messages for this scenario are not described clearly. Now the messges
    are updated to be more clear.