Magento 2 configurable product not open
<p>I migrate one of my client's website from Magento 1.7 to Magento 2.1. All products work properly but when I open configurable product from admin it will not open and give this kind of message. </p>

<p><a href="https://i.stack.imgur.com/Gjy1B.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/Gjy1B.png" alt="enter image description here"></a></p>

<p>And this message appears in system log </p>

<pre><code>[2016-09-15 07:43:56] main.CRITICAL: Requested product doesn't exist [] []
</code></pre>

<p>Any suggestions?</p>