Whether or not the fact turns out to be false or not is not the issue. There is an open discussion about the validity of that trivia, which you have previously been informed about and you chose not to take part in it.
The discussion is still active, the last reply was less than a week ago, but you have removed the disputed line of trivia for the second time instead of taking part in the discussion.
It is not permitted to remove disputed facts while there is an open discussion about them. If you have an opinion of the fact in dispute, you should take part in the discussion.