docs/data/reusables/release-notes/ghe-cluster-config-apply-error.md

During an upgrade to GitHub Enterprise Server 3.8.0 on a cluster, after you upgrade nodes other than the primary MySQL node and before you upgrade the primary MySQL node, the following error may appear multiple times after you run ghe-config-apply.

Error response from daemon: conflict: unable to delete IMAGE_ID (cannot be forced) - image is being used by running container CONTAINER_ID

You can safely ignore this message.