I think it's a hoax. None of the other news sources are mentioning it. So maybe some minor LDP bureaucrat released a report recommending the constitution be amended, so what? That happens all the time. But the constitution has never been amended, there has never been an attempt to amend it. It is just not going to happen.
BTW, that was really a bad way to post a link, try using the url tags instead of posting urls that are too long for the regular width of the FG windows.