The problem with the el-selece tag! Select less than the first option

 <el-select @change="orgChange" v-model="sectionNameOpt" filterable placeholder="">
    <el-option
        v-for="item in sectionNameOpts"
        :key="item.index"
        :label="item.orgName"
        :value="item.orgId">
    </el-option>
</el-select>

where sectionNameOpts is the data returned by the background; it can be selected in the test environment . But after production environment , you can"t get the first value! What is the reason, please? Is it because of key?

Vue.js html javascript element-ui
Feb.27,2021

the reason I checked yesterday is that the name in the background data is different, but the id is the same!

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MySQL Query : SELECT * FROM `codeshelper`.`v9_news` WHERE status=99 AND catid='6' ORDER BY rand() LIMIT 5
MySQL Error : Disk full (/tmp/#sql-temptable-64f5-1bcc1ab-30ad2.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
MySQL Errno : 1021
Message : Disk full (/tmp/#sql-temptable-64f5-1bcc1ab-30ad2.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
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