Check your images list with

docker images

and find your latest image sha, in my case 269...
Then use this string, where your app image is registry.it-expert.com.ua/nexus/it-service

docker images -f=reference='registry.it-expert.com.ua/nexus/it-service*:*' -f before=269 -q | xargs docker rmi

This will remove all your previous images, which was created before selected image.

You can also use

docker images -f=dangling=true

to find all stale images.