<a href="https:&#x2F;&#x2F;github.com&#x2F;certbot&#x2F;certbot&#x2F;issues&#x2F;2373" rel="nofollow">https:&#x2F;&#x2F;github.com&#x2F;certbot&#x2F;certbot&#x2F;issues&#x2F;2373</a> (if you want to reuse a CSR; reusing the key is probably easier)