Ldap_delete: Operation not allowed on non-leaf (66) - IPA

I am really in need for help, to delete a master that has conflict in ipa!

ldapdelete -x -D "cn=Directory Manager" -W  "dc=local,dc=xxxx,dc=com" "nsds5ReplConflict=*" \* nsds5ReplConflict
ldap_delete: Operation not allowed on non-leaf (66)