Server misconfigurations, such as conflicting rules or restrictions, can interfere with the proper execution of 301 redirects. Review your server configuration files and check for conflicting rules or restrictions that may be affecting the performance of your 301 redirects.

A 301 redirect is what you're looking for. Take the content in your blog posts and put it into the new template on the new URL, and add a 301 redirect to the old URL. A 301 redirect will not generally harm your SEO.

How do I fix a redirect chain? Once you've found the redirect chains, you then need to update the redirect to ensure it's redirecting to the final URL. This means you should remove unnecessary redirects within the chain and ensure there's just one 301 redirect in place that redirects the starting URL to the target URL.

A 301 redirect signals to search engines that content has been permanently moved to another page. This is the most commonly used redirect, mainly because it's the best for SEO purposes. All the links pointing to the old page will be redirected to the new one, and all the link value remains intact.