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We need to update our prestashop from version 18.104.22.168 to 1.4.8! Our version has been modified and ALL changes must work after the upgrade. The transaction must occur before a secondary server. After a thorough audit can go online.
Our site has 5 languages, and the modules installed, these modules will work.
The update should solve a problem with the url rewrite on specific languages and a problem with the meta titles, if the update did not have to solve these problems, they need to be accommodated. ES url rewrite in Japanese is not supported by 22.214.171.124.
Please indicate the cost and completion time.