封裝餓了嗎element-ui的timepicker時候出現如下錯誤：

[Vue warn]: Avoid mutating a prop directly since the value will be overwritten whenever the parent component re-renders. Instead, use a data or computed property based on the prop's value. Prop being mutated: "value" 
(found in <ElInput>)
warn @ vue.js?1a2a:564
(anonymous) @ vue.js?1a2a:2699
reactiveSetter @ vue.js?1a2a:864
updateChildComponent @ vue.js?d304:2468
prepatch @ vue.js?d304:3343
patchVnode @ vue.js?d304:5136
updateChildren @ vue.js?d304:5064
patchVnode @ vue.js?d304:5147
updateChildren @ vue.js?d304:5064
patchVnode @ vue.js?d304:5147
updateChildren @ vue.js?d304:5064
patchVnode @ vue.js?d304:5147
updateChildren @ vue.js?d304:5064
patchVnode @ vue.js?d304:5147
updateChildren @ vue.js?d304:5064
patchVnode @ vue.js?d304:5147
updateChildren @ vue.js?d304:5064
patchVnode @ vue.js?d304:5147
patch @ vue.js?d304:5271
Vue._update @ vue.js?d304:2303
updateComponent @ vue.js?d304:2419
get @ vue.js?d304:2756
run @ vue.js?d304:2826
flushSchedulerQueue @ vue.js?d304:2595
(anonymous) @ vue.js?d304:658
nextTickHandler @ vue.js?d304:605
vue.js?1a2a:564 [Vue warn]: Avoid mutating a prop directly since the value will be overwritten whenever the parent component re-renders. Instead, use a data or computed property based on the prop's value. Prop being mutated: "readonly" 
(found in <ElInput>)

#封裝程式碼如下：

<template>
  <p class="block">
    <span class="demonstration">时间</span>
    <el-date-picker
      v-model="date"
      type="datetimerange"
      placeholder="Select time range">
    </el-date-picker>
  </p>
</template>

<script>
  export default {
    name:"timepicker",
    data(){
        return{
            date:this.dateValue
        }
    },
    props: {
      dateValue: Array
    },
    computed:{
    }
  }
</script>

使用如下：

<timepicker :date-value="date"></timepicker>

當點擊時間控制選擇時間的時候，就會報錯，不點擊沒問題。
求大神幫看下如何封裝帶有v-model的組件。