"pwdHistory" Attribute Is Not Getting Deleted

Hello Team,

We have upgraded from openldap2.4.52 to openldap2.6.2 in our system. With new openldap2.6.2 version, "pwdHistory" attribute isn't being deleted.

I have executed the below command:

ldapmodify -x -y /opt/Nokia_BP/etc/ldapfiles/fssecldap.ldaproot -D uid=fsLDAPRoot,ou=People,fsFragmentId=Security,fsClusterId=ClusterRoot >/dev/null<<EOF dn: uid=Nemuadmin,ou=People,fsFragmentId=Security,fsClusterId=ClusterRoot changetype: modify delete: pwdHistory EOF

I was able to delete "pwdHistory" in old openldap2.4.52 with the same command.

Anything got changed regarding this(pwdHistory) in new openldap2.6.2 ? Or is there any other way to delete the "pwdHistory".

Thanks in advance. Best Regards, Nagesh