搭建heck+github个人博客遇到的问题

搭建heck+github个人博客，遇到Jekyll主题不支持？谁能帮忙解决一下？

You are attempting to use a Jekyll theme, "landscape", which is not supported by GitHub Pages. Please visit https://pages.github.com/themes/ for a list of supported themes. If you are using the "theme" configuration variable for something other than a Jekyll theme, we recommend you rename this variable throughout your site.