里层得复选框会多出来id，只想要复选框怎么改？

Question

<el-checkbox-group v-model="checkList">
 <el-checkbox :label="emr.hospital_id"  :key="emr.hospital_id"
                     @change="checkbox(emr)" v-model="check"
                      style="float: right;margin-top:49px" 
                      v-if="showSelected===true"
        >
        </el-checkbox>
 </el-checkbox-group>

const hosList = [];

  for (let i = 0; i < this.emrList.length; i++) {
    hosList.push(this.emrList[i].hospital_id);
  }  this.checkList = val ? hosList : [];

这段代码写完之后，点击外层得得复选框，里层得复选框会多出来id，只想要复选框怎么改？