Start by contacting the person directly and asking if they’re willing to remove or edit the milestone. If it’s based on public knowledge, such as credited work, media appearances, or content that already exists on other platforms and clearly shows you, then they’re within their rights to include it.
However, if they refuse to remove it and it contains private information or something you believe crosses a line, you can contact us and we’ll take a look. While we don’t mediate personal disputes, we do take privacy concerns seriously and will step in if something clearly violates our guidelines.