I have upgrade a site from 4.11.10 to 6.2.5

After the Upgrade empty properties are no longer in the XML-file (umbraco.config)

v4.11.10

  <boxItem id="19235" parentID="15636" level="3" writerID="164" creatorID="0" nodeType="15408" template="-1" sortOrder="0" createDate="2013-04-24T13:12:06" updateDate="2014-09-10T10:20:42" nodeName="Weekend og feriekurser" urlName="weekend-og-feriekurser" writerName="Snebjørn Andersen (Admin)" creatorName="Henrik Bro (Admin)" path="-1,10266,15636,19235" isDoc="">
    <boxHeadline>Weekend og feriekurser</boxHeadline>
    <boxText><![CDATA[]]></boxText>
    <boxImage><![CDATA[]]></boxImage>
    <boxLink>
      <url-picker mode="URL">
        <new-window>False</new-window>
        <node-id />
        <url>/weekend-og-feriekurser/</url>
        <link-title />
      </url-picker>
    </boxLink>
    <boxHeaderPosition><![CDATA[]]></boxHeaderPosition>
    <boxTextFloat><![CDATA[]]></boxTextFloat>
    <boxImageHeight />
    <boxImageWidth />
  </boxItem>

v6.2.5

  <boxItem id="19236" parentID="15636" level="3" creatorID="0" sortOrder="3" createDate="2013-04-24T13:12:27" updateDate="2016-02-04T09:23:26" nodeName="Foredrag, samvær og debat" urlName="foredrag-samvaer-og-debat" path="-1,10266,15636,19236" isDoc="" nodeType="15408" creatorName="Henrik Bro (Admin)" writerName="Henrik Bro (Admin)" writerID="0" template="0" nodeTypeAlias="boxItem">
    <boxHeadline>Seniorskolen, samvær og debat</boxHeadline>
    <boxLink>
      <url-picker mode="URL">
        <new-window>False</new-window>
        <node-id />
        <url>/foredrag,-samvaer-og-debat/</url>
        <link-title />
      </url-picker>
    </boxLink>
    <boxHeaderPosition><![CDATA[Over]]></boxHeaderPosition>
  </boxItem>

The "boxHeaderPosition" was created after the upgrade when I choosed the value "Over".

Is it posibe to re-create the properties?

Best regards, Henrik