Title: 400 Errors and 404 Errors
Last modified: August 21, 2016

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# 400 Errors and 404 Errors

 *  [nebuloushomosapien](https://wordpress.org/support/users/nebuloushomosapien/)
 * (@nebuloushomosapien)
 * [12 years, 6 months ago](https://wordpress.org/support/topic/400-errors-and-404-errors/)
 * Hi,
 * I’ve recently changed my websites permalink structure and have deleted previous
   products and added new products on it.
 * The permalink structure was
 * wwww.myexample.com.au/product/reyhan
 * to:
    [http://www.myexample.com.au/reyhan](http://www.myexample.com.au/reyhan)
 * I did this via a plugin
 * After doing all these changes Ive got 16,000+ 400 errors and also around 10,000
   + 404 Errors.. All my links are working perfectly but google just shows me all
   these errors and thus my websites rating has gone down.. any ideas on how to 
   remove them? I’ve heard 400 errors are killers really so want them out atleast
   ASAP
 * All help would be APPRECIATED!!

Viewing 1 replies (of 1 total)

 *  [wpismypuppet](https://wordpress.org/support/users/wordpressismypuppet/)
 * (@wordpressismypuppet)
 * [12 years, 6 months ago](https://wordpress.org/support/topic/400-errors-and-404-errors/#post-4240615)
 * You need 301 redirects for all your products. Because you had 16,000+ products
   all with the word /product/ in front of them in the URL structure, your website
   was parsed in Google that way. Now that you have removed /product/ from your 
   URL, Google is looking for it’s parsed links and is failing, resulting in the
   400 and 404.
 * What you should have done is used a plugin, or manually created your own, to 
   set up a 301 redirect for every single one of your products. This would tell 
   the Google parser that this page: /product/someproduct is now at /someproduct.
   Google will now see that redirect and not penalize you for it.
 * Instead, Google sees the new page /someproduct and will now include that, but
   it’s still looking for the old page /product/someproduct and it’s getting a 404
   because it doesn’t exist anymore. Now you get a penalty and lose credit with 
   SEO.

Viewing 1 replies (of 1 total)

The topic ‘400 Errors and 404 Errors’ is closed to new replies.

 * In: [Fixing WordPress](https://wordpress.org/support/forum/how-to-and-troubleshooting/)
 * 1 reply
 * 2 participants
 * Last reply from: [wpismypuppet](https://wordpress.org/support/users/wordpressismypuppet/)
 * Last activity: [12 years, 6 months ago](https://wordpress.org/support/topic/400-errors-and-404-errors/#post-4240615)
 * Status: not resolved

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