Thread:Sophiedp/@comment-44548394-20200924182528/@comment-24692230-20200924225921

The AbuseFilter code "hooks" into the edit process, so when you save the page, it runs the edit against the filters set up, and if the edit matches a filter, the filter takes the actions that the filter is set up to take.

tldr: they problly tried to spam and the filter caught them.