error: Conflicting declarations: value-parameter _1: Number?, value-parameter _1: VNode?‌

<template>  
    <scroll-view :scroll-top="0" direction="vertical" scroll-with-animation="true" :show-scrollbar="true"  
        class="contain">  
        <view class="ux-bg-white">  
            <view class="ux-list-items" v-for="(item,index) in 6" :key="index">{{item}}</view>  
        </view>  
    </scroll-view>  
</template>  

<script>  
    export default {  
        data() {  
            return {  

            }  
        },  
        created() {  
        },  
        methods: {  

        }  
    }  
</script>  

<style lang="scss" scoped>  

</style>

上面代码for循环时报错：
14:28:18.707 [plugin:uni:app-uts] 编译失败
14:28:18.707 ‌error: Conflicting declarations: value-parameter _1: Number?, value-parameter _1: VNode?‌
14:28:18.707 at components/form-list/index.uvue:5:39
14:28:18.707 3 | class="contain">
14:28:18.707 4 | <view class="ux-bg-white">
14:28:18.707 5 | <view class="ux-list-items" v-for="(item,index) in 6" :key="index">{{item}}</view>
14:28:18.707 | ^
14:28:18.707 6 | </view>
14:28:18.707 7 | </scroll-view>