problem redirection

The error is present on all pages except the home page: Example for the website creation page: URL Redirection Warning: you have not configured a 301 redirect to send your traffic to your favorite domain. If versions with www. and without www. both load correctly, this is duplicate content! Some versions of your page point to the same URL. URL Translated to URL http://dev-web-agency.com/creation-site-internet-dijon/ http://dev-web-agency.com/creation-site-internet-dijon/ http://www.dev-web-agency.com/creation-site-internet-dijon/ http://dev-web-agency.com/creation-site-internet-dijon/ https://dev-web-agency.com/creation-site-internet-dijon/ https://dev-web-agency.com/creation-site-internet-dijon/ https://www.dev-web-agency.com/creation-site-internet-dijon/ https://dev-web-agency.com/creation-site-internet-dijon/ Your website does not redirect http://www.dev-web-agency.com/creation-site-internet-dijon/ and dev-web-agency.com/creation-site-internet-dijon/ to the same URL. It is absolutely essential that you correct this problem. Use the rel=”canonical” tag to tell search engines which version you prefer and use a 301 redirect to divert traffic away from your secondary domain. Then for ‘dijon e-commerce site’: URL Redirection Warning: you have not configured a 301 redirect to send your traffic to your favorite domain. If versions with www. and without www. both load correctly, this is duplicate content! Some versions of your page point to the same URL. URL Translated to URL http://dev-web-agency.com/agence-web-de-creation-de-site-e-commerce/ http://dev-web-agency.com/agence-web-de-creation-de- e-commerce site/ http://www.dev-web-agency.com/agence-web-de-creation-de-site-e-commerce/ http://dev-web-agency.com/agence-web-de-creation- de-site-e-commerce/ https://dev-web-agency.com/agence-web-de-creation-de-site-e-commerce/ https://dev-web-agency.com/agence-web-de-creation-de- e-commerce site/ https://www.dev-web-agency.com/agence-web-de-creation-de-site-e-commerce/ https://dev-web-agency.com/agence-web-de-creation- de-site-e-commerce for the referencing and contact page it’s the same thing but the end of the url corresponds to the corresponding page

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