Magento 2 configurable product not open - magento2

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.
And this message appears in system log
[2016-09-15 07:43:56] main.CRITICAL: Requested product doesn't exist [] []
Any suggestions?

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