[389-users] attribute passwordMinLength cfg issues/error

[Ghiurea, Isabella]

As part of user global policy we need to  configure  user password min length , see my 
cfg in dse.ldif , when trying to update  a user password to a   password with length >
0 seeing the following error:.

Result: Constraint violation (19)
Additional info: Failed to update password

Is there a plugin  I need to install or what I am missing from this cfg ?
Here is my only changes I have in dse.ldif :
nsslapd-pwpolicy-inherit-global: on
nsslapd-pwpolicy-local: off
passwordTrackUpdateTime: on
passwordCheckSyntax: on
passwordMinLength: 8


Isabella