xml sitemaps

I am new to this plugin and already have sitemaps from another plugin posted to Google. Eg: https://www.creativityatwork.com/sitemaps/post-sitemap.xml

I am deleting the plugin that created those sitemaps so does this mean I need to create new ones for Google with SEOPress? If so I get https://www.creativityatwork.com/sitemaps/post-sitemap1.xml and I prefer
https://www.creativityatwork.com/sitemaps/post-sitemap.xml Please advise. Thanks.