Epub:type not allowed in epub validator

Hey guys! I"m having an issue with the epub:type not validating. Is there an alternative way I should do footnotes for ibooks? Here's my current code:

At reference point:
<span class="charoverride"><span id="footnote-002-backlink"><a class="_idfootnotelink" href="Compound_Interest_Ebook-11.xhtml#footnote-002">2</a></span></span>

&

<span class="charoverride"><span id="footnote-001-backlink"><a class="_idfootnotelink" href="Compound_Interest_Ebook-11.xhtml#footnote-001">3</a></span></span>

at footnotes:
<div class="_idgenobjectstyleoverride">
<div id="footnote-002" class="_idgenobjectstyleoverride" epub:style="footnote">
<p class="basic-paragraph"><a class="_idfootnotelink" href="Compound_Interest_Ebook-11.xhtml#footnote-002-backlink">2</a> <span class="body-regular">pp. 112–114</span></p>
</div>
<div id="footnote-001" class="_idgenobjectstyleoverride" epub:style="footnote">
<p class="basic-paragraph"><a class="_idfootnotelink" href="Compound_Interest_Ebook-11.xhtml#footnote-001-backlink">3</a> <span class="body-regular">Ed Slott, The Retirement Savings Time Bomb… and How to Defuse It, p. 15.</span></p>
</div>
</div>