Remove an error on Magento 2 site

After migration from Magento 1 to Magento 2 I got an error when opening some categories: 1 exception(s): Exception #0 (Exception): Unsupported image format. Exception #0 (Exception): Unsupported image format. #0 /sites/www/magento2/vendor/magento/framework/Image/Adapter/[login to view URL](65): Magento\Framework\Image\Adapter\Gd2->_getCallback('create') #1 /sites/www/magento2/vendor/magento/framework/[login to view URL](55): Magento\Framework\Image\Adapter\Gd2->open('/sites/www/mage...') #2 /sites/www/magento2/vendor/magento/framework/[login to view URL](36): Magento\Framework\Image->open() #3 /sites/www/magento2/vendor/magento/framework/ObjectManager/Factory/[login to view URL](93): Magento\Framework\Image->__construct(Object(Magento\Framework\Image\Adapter\Gd2), '/sites/www/mage...') #4 /sites/www/magento2/vendor/magento/framework/ObjectManager/Factory/Dynamic/[login to view URL](89): Magento\Framework\ObjectManager\Factory\AbstractFactory->createObject('Magento\\Framewo...', Array) #5 /sites/www/magento2/vendor/magento/framework/ObjectManager/[login to view URL](57): Magento\Framework\ObjectManager\Factory\Dynamic\Developer->create('Magento\\Framewo...', Array) #6 /sites/www/magento2/vendor/magento/framework/Image/[login to view URL](45): Magento\Framework\ObjectManager\ObjectManager->create('Magento\\Framewo...', Array) ... (a lot of other information) I think that it is a problem with some images, may be you can give me a list of that images to rewrite them to server. It is definitely not a problem with permissions or 0 size images. And I need a small instruction what to do if I get this problem again. I often have such small tasks so we can work in future.