Situation

Need Re-Tag Old Image As Untag

MANIFEST=$(aws ecr batch-get-image --repository-name demo --image-ids imageDigest=<DIgestID> --output json | jq --raw-output --join-output '.images[0].imageManifest')

Re-Tag Your Image

aws ecr put-image --repository-name demo --image-tag 021 --image-manifest "$MANIFEST"