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you can upgrade from 2.6 to 2.7 no issues. But highly recommend review Install/Upgrade notes here: https://github.com/rancher/rancher/releases/tag/v2.7.3

IMO it is better to upgrade to the latest v2.6.x first, v2.6.12 currently, make sure everything works, then upgrade to v2.7.3. v2.7.x introduces a lot of changes, noticeably the deprecation of Pod Security Policy on k8s 1.25 cluster. it is highly recommended to read the release notes before attempting the upgrade.

thanks both.