Google Earth Engine（GEE）——用10米分辨率土地分类数据进行土地面积计算出现错误

var boten = ee.FeatureCollection("projects/ee-suraj7-28/assets/Boten");
var boten_shp = boten.geometry()
var Lunagprabang = ee.FeatureCollection("projects/ee-suraj7-28/assets/Luangprabang");
var Lunagprabang_shp = Lunagprabang.geometry()
var Vientiana = ee.FeatureCollection("projects/ee-suraj7-28/assets/Vientiana");
var Vientiana_shp = Vientiana.geometry()
// Buffer//
var boten_buffer=boten_shp.buffer(20000)
var Lunagprabang_buffer=Lunagprabang_shp.buffer(20000)
var Vientiana_buffer=Vientiana_shp.buffer(20000)
var features = ee.FeatureCollection([
  ee.Feature(boten_buffer, {label: 'Boten'}),
  ee.Feature(Lunagprabang_buffer, {label: 'Lunagprabang'}),
  ee.Feature(Vientiana_buffer, {label: 'vientiana'}),
])
print(features)
var years = ee.List.sequence(2021,2022)
var calculateClassAreaByYear = features.map(function(feature){
  var dw2=years.map(function(year){
  var dw1= ee.ImageCollection('GOOGLE/DYNAMICWORLD/V1')
              .filterDate(ee.Date.fromYMD(year, 1, 1), ee.Date.fromYMD(year, 12, 1)).filter(ee.Filter.bounds(feature)).select('label').reduce(ee.Reducer.mode()).eq(6);
              return dw1
              })
              return ee.FeatureCollection(dw2)
    })
print(calculateClassAreaByYear.flatten())

var years = ee.List.sequence(2021,2022)
var calculateClassAreaByYear = features.map(function(feature){
  var dw2=years.map(function(year){
  var dw1= ee.ImageCollection('GOOGLE/DYNAMICWORLD/V1')
              .filterDate(ee.Date.fromYMD(year, 1, 1), ee.Date.fromYMD(year, 12, 31)).filter(ee.Filter.bounds(feature.geometry())).select('label').reduce(ee.Reducer.mode()).eq(6);
  var areaImage = dw1.multiply(ee.Image.pixelArea())    
  var area = areaImage.reduceRegion({
  reducer: ee.Reducer.sum(),
  geometry: feature.geometry(),
  scale: 10,
  maxPixels: 1e10
  })