Changing the site’s main address or its secondary mirror’s address

The main mirror of the site may change if a redirect or the rel="canonical" attribute pointing to the site that became the main mirror is set on the old site pages. To avoid automatic selection of the main site address in the future, make sure that pages of all secondary mirrors redirect to the corresponding pages of the desired main address.

This means that the indexing bot has selected the main site address automatically. Specify the correct site URL for the robot, following the recommendations in the Moving a site to a new domain name section.

Main reasons why sites are not grouped:

• In the source code of the site that should become the main mirror contains the attribute rel="canonical". Delete it and submit the request for moving again.
• The site is unavailable or responds with a long delay.
• The sites' content doesn't match. Check if the internal page URLs and headers match.
• The site moves to another domain zone without a redirect.
• Site indexing is prohibited in the robots.txt file.
• Violations of the Search rules are detected on the site. View the details on the Security and violations page in Yandex Webmaster and fix the errors. In two weeks, check that the message about the violation disappears from Yandex Webmaster, and re-send the request.
• The request was sent from the site to move to.
• Internal service error. Try sending the request later.