<p>In the example below, we agreed that we will not cretae duplicates in the last level of hierarchy and thus we agreed to make the levels like this.</p>

<p>Grandfather &gt; Son No 1&gt;&nbsp; Grand Son No 11<br />
Grandfather &gt; Son No 1&gt;&nbsp; Grand Son No 12<br />
Grandfather &gt; Son No 2&gt;&nbsp; Grand Son No 21<br />
Grandfather &gt; Son No 2&gt;&nbsp; Grand Son No 22<br />
&nbsp;</p>

<p>But the import is being affected still due to the duplication seen at the previous level</p>
