DROP FOREIGN KEY not working
<p>On PHPMyAdmin, I would like to <strong><em>DROP</em></strong> a <strong><em>FOREIGN KEY</em></strong> with</p>

<pre><code>ALTER TABLE information DROP FOREIGN KEY IDX_29791883B30676A7
</code></pre>

<p>Because when I do the next query it's not working:</p>

<pre><code>ALTER TABLE information DROP INDEX IDX_29791883B30676A7
</code></pre>

<blockquote>
  <p>Cannot drop index 'IDX_29791883B30676A7': needed in a foreign key constraint</p>
</blockquote>

<p>However, the second query as the error that the index is use as foreigner key. 
Fine, but when I do the first query I get this error:</p>

<blockquote>
  <p>Can't DROP 'IDX_29791883B30676A7'; check that column/key exists</p>
</blockquote>

<p>So the questions are:</p>

<ul>
<li>How do I acually <em>check that</em>,</li>
<li>How can I finally <em>drop that key</em>.</li>
</ul>