picker组件在级联选择的场景下，报类型错误

[gin280]

Steps to reproduce
场景说明：
Picker组件在级联选择的情况下报错

<template>
  <Form :form="form">
    <SchemaField>
      <SchemaStringField
        name="picker"
        title="城市"
        x-component="Picker"
        :x-component-props="{
          formItemProps: {
            placeholder: '选择城市',
          },
          popupProps: {},
          pickerProps: {
            columns: [
        {
          text: '浙江',
          children: [
            {
              text: '杭州',
              children: [{ text: '西湖区' }, { text: '余杭区' }],
            },
            {
              text: '温州',
              children: [{ text: '鹿城区' }, { text: '瓯海区' }],
            },
          ],
        },
        {
          text: '福建',
          children: [
            {
              text: '福州',
              children: [{ text: '鼓楼区' }, { text: '台江区' }],
            },
            {
              text: '厦门',
              children: [{ text: '思明区' }, { text: '海沧区' }],
            },
          ],
        },
      ]
          },
          fieldListeners: {},
          popupListeners: {},
          pickerListeners: {},
        }"
      />
    </SchemaField>
    <Submit :style="{ 'margin-top': '16px' }" round block @submit="log">
      提交
    </Submit>
  </Form>
</template>

What is expected?
期望：不报错

What is actually happening?
现状： [Vue warn]: Invalid prop: type check failed for prop "value". Expected Number, String, got Array