ry-7">Maintainers</a></li>
</ul>
</li>
</ul>
</div>
<div class="section" id="usage">
<h1><a class="toc-backref" href="#toc-entry-1">Usage</a></h1>
<ul class="simple">
<li>Unable to save a product when a new internal reference or default_code
value is the same with an existing record.</li>
<li>A pre_init_hook process is initiated when there exist records without
an internal reference(default_code). A default value is generated to
populate empty field as a temporary value.</li>
</ul>
</div>
<div class="sectio