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/[url removed, login to view](65): Magento\Framework\Image\Adapter\Gd2->_getCallback('create')

#1 /sites/www/magento2/vendor/magento/framework/[url removed, login to view](55): Magento\Framework\Image\Adapter\Gd2->open('/sites/www/mage...')

#2 /sites/www/magento2/vendor/magento/framework/[url removed, login to view](36): Magento\Framework\Image->open()

#3 /sites/www/magento2/vendor/magento/framework/ObjectManager/Factory/[url removed, login to view](93): Magento\Framework\Image->__construct(Object(Magento\Framework\Image\Adapter\Gd2), '/sites/www/mage...')

#4 /sites/www/magento2/vendor/magento/framework/ObjectManager/Factory/Dynamic/[url removed, login to view](89): Magento\Framework\ObjectManager\Factory\AbstractFactory->createObject('Magento\\Framewo...', Array)

#5 /sites/www/magento2/vendor/magento/framework/ObjectManager/[url removed, login to view](57): Magento\Framework\ObjectManager\Factory\Dynamic\Developer->create('Magento\\Framewo...', Array)

#6 /sites/www/magento2/vendor/magento/framework/Image/[url removed, login to view](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.

Skills: CSS, Image Processing, Magento, PHP

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Project ID: #14971035