I've been reading this question on StackOverflow Can I change a favicon daily, but I'd like to know if changing the favicon daily mess up any SEO or raise any concerns with search engines?
I am using Ubuntu's Apache.
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No, favicon is mostly affecting user experience and the brand awareness it wont have any affect on SEO.
Read more about favicons: https://www.woorank.com/en/blog/the-importance-of-favicons-for-seo