After migrate server, default placeholder image are showing on admin, minicart, checkout pages

After migrate server(copy files and dumb db), default placeholder image are showing on admin, minicart, checkout pages.
Product images are showing well on category and product detail, shopping cart pages.

I got reply about this from support

At the currently observed misbehaviour stems from the incorrect assignment of product images on the backend

As you may observe, the backend images for the grouped product appear to be set to the default shop thumbnail.

At the same time, the full image path of this product seems to lead to a cached image, and should roll back to the thumbnail once the cache is purged

What should I do to make correct image are showing on admin, minicart,checkout pages too?