Duplicate Content from WordPress Category Base?

[JABacchetta]

I recently changed my category base in WordPress and instead of redirecting or deleting the old base, WordPress kept the content up. So I now have duplicate content on two different urls - one on the old category base, one on the new category base.

How should I handle this situation? The site is only a couple weeks old, if that makes any difference.

[TomRayner]

I would put in a 301 redirect from the old category URL to the new category URL.

You can learn more about redirection with this Moz guide, but what it will effectively do is stop both of the pages being crawled, resolving any duplicate content issue.

[JABacchetta]

I wonder why WordPress wouldn't implement this automatically? They automatically 301 posts when you change the url, why not a category base?

[Esaky]

Few Links, i have redirect to the other post ! but still it has shown as warning and same 404 error