You cannot remove images having multiple repositories without the force modifier, see Docker docs for more info.
docker images
REPOSITORY TAG IMAGE ID CREATED SIZE
repository/image-name tag a8e6fa672e89 10 days ago 344MB
repository2/image-name tag a8e6fa672e89 10 days ago 344MB
If you want to do it manually, instead of using the image id to remove the images, you must remove the repository/tag that you don’t need using image names:
docker rmi a8e6fa672e89
Error response from daemon: conflict: unable to delete a8e6fa672e89 (must be forced) - image is referenced in multiple repositories
Remove the repository/tag you don’t need:
docker rmi repository/image-name:tag
Untagged: repository/image-name:tag
Untagged: repository/image-name:tag@sha256:64b5a02e2bb3ee4d4b7c0982e8e2e5eb68bdfd0fb096fce22b6c030dafb53a33
(Repeat last step until only one repository/tag remains) And now you will be able to remove the image:
docker rmi a8e6fa672e89
Untagged: repository2/image-name:tag
Deleted: sha256:a8e6fa672e89b399bd3ac52b96c031e6816a69191d1fd7e6a1839fd643e3c751
Deleted: sha256:9861dd7b5783217515f571fdcfa6729e1e38af3ae9c971026e5a317b12fc5905
If you use the -f flag and specify the image’s short or long ID, then rmi untags and removes all images that match the specified ID.