Product Route Url Changes 404 Error : Seo

[laurent0071]

Hi all,

 

I want to change the product route from {categories:/}{id}-{rewrite}.html to {categories:/}{rewrite}-{id}.html

 

To apply the change it's working but the problem is that the old URLs are not working and will show error 404

 

Someone know how and where should I write a permanent redirect to avoid Error 404 ?

 

I guess something to deal with link.php / dispatcher.php

 

I am not a developper so I don't know how to write this rule :

 

If a product page leads to error 404 then goest to that path to find the product : {categories:/}{id}-{rewrite}.html

[Scully]

I would use .htaccess directives to redirect from old to new url. However I wouln't change the URL settings at all if a shop is running productively already.