Why am i getting this error
Notice: Undefined index: sum_1 in C:\wamp\www\ee\system\modules\rating\mod.rating.php on line 3305
{exp:rating:stats entry_id="{entry_id}" theme="default"}{stars_overall_avg}
<p class="attributes">Based on {overall_count} review{if overall_count != “1"}s{/if}</p>
{/exp:rating:stats}
{exp:rating:form entry_id="{entry_id}" form_name="review" anonymous="yes" status="open" return="{path=’rating/thanks’}"}
<input type="hidden" name="name" value="{screen_name}" />
<label for="review">Your Rating</label>
<select name="rating">
<option value="1">1</option>
<option value="2">2</option>
<option value="3">3</option>
<option value="4">4</option>
<option value="5">5</option>
</select>
<input name="Submit" type="Submit" value="Submit">
{/exp:rating:form}
