Landscape splinemesh ‘out of date’ and can't be deleted/MapCheck doesn't work

As the image shows below,there is a legacy road mesh with no control point in the stream level,and usually there will be some error occur in the MapCheck as ‘out of date’.But this time,that doesn’t show up.And i tried all the method searched in google(really a lot of guys suffered this),but those all doesn’t help.So is there any console commander or something could refresh the spline imformation?Any help will be appeciated.