How have only one permalink

It’s actually just fine for SEO, and you should probably fire (or stop reading) whomever told you otherwise. 🙂

Each non-canonical version issues a 301 (Moved Permanently) redirect to the canonical permalink, which means that search bots will only identify the destination page, http://zabancollege.com/new-page

For more details, see https://en.wikipedia.org/wiki/HTTP_301