Duplicate tags at joomla 3.8.1

[niaziblog]

Steps to reproduce the issue

i create menu for tag
menu url for tag is : yoursite.com/tag/tag-name
but every tag show with 2 url
yoursite.com/tag/tagname
yoursite.com/tag/id

Expected result

video for this problem link
http://bit.ly/2yxTjxE

Actual result

System information (as much as possible)

Joomla! Version	Joomla! 3.8.1 Stable [ Amani ] 4-October-2017 14:00 GMT
Joomla! Platform Version	Joomla Platform 13.1.0 Stable [ Curiosity ] 24-Apr-2013 00:00 GMT

Additional comments

please fix this problem

[csthomas]

The version with yoursite.com/tag/id-tagname (or unofficial yoursite.com/tag/id) comes from "old routing" before PR #11166, which was added in Joomla 3.7.0.

yoursite.com/tag/tagname is supported from J3.7.0.

1. Joomla could add a button in component tags to disable "old routing" and returns 404,
   • maybe modern routing could be implemented
2. Or someone can add canonical URLs as similar as in Always add rel canonical in article view (? rare issue of alternative URLs found by search engines) #18341

[eSilverStrike]

We should be adding canonical URLs for tags (and for most content Joomla displays). Joomla has created a big SEO mess by allowing the same content to be accessed by different URLs.

I was hoping this would be fixed with the new routing system and of course it was not. It's nice they added the ability to remove ids from URLs but for existing sites to enable this feature, it creates duplicate content. Google does not like duplicate content and may rank the pages lower. For more information see: https://support.google.com/webmasters/answer/139066?hl=en

[joomla-cms-bot]

Set to "closed" on behalf of @franz-wohlkoenig by The JTracker Application at issues.joomla.org/joomla-cms/18363

closed as having Pull Request #18407