We are adding the removal of untagged images, untagged manifests and unreferenced layers to our garbage collection on 1.5.2026.
Please make sure you are not pulling untagged images by digest, eg. tag any needed images you create (:latest is, for example, just fine).
This should not affect anyone who uses the image registry "normally". If you need more time or have questions pleace contact the helpdesk and re: Mika Elmeranta.
Read more about the change here:
https://docs.gitlab.com/administration/packages/container_registry/#removing-untagged-manifests-and-unreferenced-layers