Echarts数据溢出怎么解决

Echarts使用了watch监听后数据重复超出怎么解决

```javascript
data() {
    return {
      chart: null,
    }
  },
watch: {
  monthStrList: {
    handler(val) {
      this.setOptions(val)
    }
  },
  monthStrList2: {
    handler(val) {
      this.setOptions(val)
    },
  },

},

  mounted() {
    this.$nextTick(() => {
      this.initCharts()
    })
  },
  beforeDestroy() {
    if (!this.chart) {
      return
    }
    this.chart.dispose()
    this.chart = null
  },
  methods: {
    initCharts() {
      this.chart = echarts.init(this.$refs.stripChart)
      this.chart.clear();
      this.setOptions(this.chartData)
    },
    setOptions() {
      this.chart.setOption({
        legend: {
          show: this.show,
          data: [this.name, this.name2],
          icon: 'rect',
          itemWidth: 20,
          itemHeight: 10,
          itemGap: 10,
          left: '14%',
          top: '2%',
          textStyle: {
            fontSize: 12,
            color: ['#FF9435', '#899dbf']
          },
        },
        tooltip: {
          // show: true, // 显示图例的tooltip
          // trigger: 'axis',
          // axisPointer: {
          //   type: 'shadow' // 'shadow' as default; can also be 'line' or 'shadow'
          // }
        },
        grid: {
          top: '8%',
          left: '2%',
          right: '2%',
          bottom: '10%',
          containLabel: true
        },
        xAxis: {
          type: 'value',
          splitLine: {show: false},//坐标轴在 grid 区域中的分隔线
          // axisLabel: {show: false},//坐标轴刻度标签
          axisTick: {show: false},//坐标轴刻度
          axisLine: {show: false},//坐标轴轴线
        },
        yAxis: {
          type: 'category',
          axisTick: {show: false},
          axisLine: {show: false},
          axisLabel :{
            interval:0,
          },

          data: this.monthData,
          // data: [
          //   '一月', '二月', '三月', '四月', '五月', '六月', '七月', '八月', '九月', '十月', '十一月', '十二月'
          // ],
          inverse: true,
          max: 5
        },
        series: [{
            name: this.name,
            type: 'bar',
            stack: 'total',
            color: this.color,
            label: {
              show: this.show,
            },
            emphasis: {
              focus: 'series'
            },
            data: this.monthStrList,
            // data: [20, 32, 18, 34, 30, 33]
          },
          {
            name: this.name2,
            type: 'bar',
            stack: 'total',
            color: this.color2,
            label: {
              show: this.show,
            },
            emphasis: {
              focus: 'series'
            },
            data: this.monthStrList2,
            // data: [12, 13, 10, 34, 9, 30]
          },
        ],

        animationDuration: 0,
        animationDurationUpdate: 500,
        animationEasing: 'linear',
        animationEasingUpdate: 'linear'
      })

    }
  }

你的需求是什么，想要他们不重叠显示吗，还是啥