Unsupported MIME type for compression: application/vnd.in-toto+json" with skopeo copy -a for image docker:docker.io/nginxinc/nginx-unprivileged:1.23-alpine

[wlawton]

Trying to copy all images for docker.io/nginxinc/nginx-unprivileged:1.23-alpine using command

skopeo --debug copy -a docker://docker.io/nginxinc/nginx-unprivileged:1.23-alpine docker://$FQ_IMAGE

According to the logs there are 14 images and skopeo throws an error copying image 8/14:

time="2023-12-05T15:41:07Z" level=fatal msg="Error creating an updated image manifest: Error preparing updated manifest, layer "sha256:b85a9c17167ad510b9b3bdff6fecbd798ed81c70188a4732fb128273996e2e7e": unsupported MIME type for compression: application/vnd.in-toto+json"

Debug log attached[
skopeo_debug_log.log
](url)

[wlawton]

Was using skopeo version 1.2.1 in docker:20.10.3-git container. Switched to alpine:latest which installs skopeo 1.12.0 and issue is resolved.