Magento Upgrade : 2.0.2 to 2.1.2

Question

After upgrade magento 2.0.2 to 2.1.2 through composer i get following error :

Autoload error: 'magento/framework' component already exists

How to solve this error?

Without that i can't access front end and back end.

Answer 1

I solved above error by clear following directories :

{magento root} \app\design\frontend\Magento

{magento root} \app\code\Magento

{magento root} \lib\internal\Magento\Framework