html error id relationshipTypeID declared twice

On page civicrm/admin/reltype?reset=1

The button to add a new relationship type is added twice - both times with the same id - which is invalid html

<a href="

{crmURL q="action=add&reset=1"}

" id="newRelationshipType" class="button"><span><div class="icon add-icon"></div>

{ts}

Add Relationship Type

{/ts}

</span></a>