After migration of edirectory, while testing I am not able to prevent users from repeating the current password as new password.

Earlier when user try to use the same password, they face the error "New password has been configured previously"

But now I am not getting this and user is able to repeat their previous password.

My SSPR is present on Linux and I used apache-tomcat-7.0.29:

1. Is there any way where I can check the issue and apply the same setting which was used previously.
2. Also can this issue be related because I have migrated eDirectory from one windows server to other ?