https://bugs.openldap.org/show_bug.cgi?id=7788
--- Comment #4 from Clément OUDOT clement.oudot@worteks.com --- I don't think this solves the issue. The problem is on entries that are not linked to any password policy are updated by ppolicy overlay. Adding a parameter in the password policy is not a good solution from my point of view.
The entry should never be updated by ppolicy overlay if no ppolicy definition is applied to it.
Note that this bug was opened 6 years ago, I did not test recent OpenLDAP versions.