此错误意味着什么？
error message
当我将filteredData变量放入表的tr标记中时，就会发生这种情况。

<table id="table">
    <tr>
      <th>First name</th>
      <th>Last Name</th>
      <th>Email</th>
      <th>Original email</th>
      <th>Actions</th>
    </tr>
    <template>
      <tr v-if="(fiteredData = '')">
        <td></td>
        <td></td>
        <td></td>
        <td></td>
        <td></td>
      </tr>
      <tr
        v-else
        v-for="data in filteredData"
        :key="data.ind_id"
        :value="data.ind_id"
      >
        <td>{{ data.first_name }}</td>
        <td>{{ data.last_name }}</td>
        <td>{{ data.email }}</td>
        <td>{{ data.email }}</td>
        <td>
          <button @click="sendProps(data)">
            <i class="fa-regular fa-edit" aria-hidden="true"></i>
          </button>
        </td>
      </tr>
    </template>
  </table>

这是我的方法：

data() {
    return {
      fetchedData: "",
      filteredData: "",
    };
  },
  methods: {
    searchResult(e) {
      this.filteredData = this.fetchedData.filter((data) => {
        return data.email.toLowerCase().includes(this.email.toLowerCase());
      });
      e.preventDefault();
      console.log(this.filteredData);
    }

fetchedData从以下位置获取数据：

async mounted() {
    await axios.get("http://localhost:5000/individuals").then((result) => {
      this.fetchedData = result.data;
      console.log(this.fetchedData);
    });
  },