I import images in Magento 2 via CSV and this works for base, small and thumb image, just fine! However, in the product view, all three images are shown, as opposed to only the base image. This way, I see three different versions of the same picture in each product page. When I manually change this and export the product via CSV, i don't see any difference. Any ideas? Thanks :) Mike
I ran into this when I first was able to successfully import from 1.9x to 2x and there was nothing in the forums or online yet.
I finally found a way to do it in bulk (i had about 70k+ products) by running an SQL command without compromising any other data (at least from what I could tell)