I am facing a problem that i have a sitemap.xml file already as i am using all in one seo,then i hav installed seo by yoast some how i have got sitemap_index.xml file ,the issue is the sitemap_index is not working ,it hav updated some content then after some days it is not updating at all ,Do i have a solution for this? or can i change seo yoast to use the sitemap.xml file please give a solution thank you.
