If you notice the issue "Nofollow in HTML and HTTP header" in your site audit report, this refers to:
"Pages with a "nofollow" implemented both in meta tag and in HTTP response header (X-Robots tag)."
We then inform you of what you can do to fix this issue:
"It is enough to implement a "nofollow" either in HTML meta tag or in HTTP header"
So to avoid this issue in the first place, you should NOT implement a "nofollow" in both the HTML meta tag and HTTP header.