Rename page

error:category%2F%E3%83%8D%E3%83%83%E3%83%88%E9%96%A2%E9%80%A3%2F%E3%83%80%E3%82%A4%E3%82%A2%E3%83%AB%E3%82%A2%E3%83%83%E3%83%97%E3%80%81%E9%9B%BB%E8%A9%B1 is not a valid pagename.