Exlude one category?

i want to do noindex nofollow for one category, i put this in my header:

<?php if (is_category(‘news’)) { ?><meta name=”robots” content=”noindex, nofollow”><?php } ?>

but this plugin already specifies “index,follow” so it becomes a double tag in my header section, i want this plugin to exclude this category, how can i do this?

https://ww.wp.xz.cn/plugins/platinum-seo-pack/