## Urgent Upgrade Notes 

### (No, really, you MUST read this before you upgrade)

- 'The `IPv6DualStack` feature gate for external cloud providers was removed.
  (The feature became GA in 1.23 and the gate was removed for all other
  components several releases ago.) If you were still manually

initially [deprecated in v1.21](/blog/2021/04/06/podsecuritypolicy-deprecation-past-present-and-future/), and with the release of v1.25, it has been removed. The updates required to improve its usability would have introduced breaking changes, so it became necessary to remove it in favor of a more friendly replacement. That replacement is [Pod Security Admission](/docs/concepts/security/pod-security-admission/), which graduates to Stable with this release. If you are currently relying on PodSecurityPolicy,...

   ([#123341](https://github.com/kubernetes/kubernetes/pull/123341), [@neolit...

- DRA: when the scheduler had to deallocate a claim after a node became unsuitable for a pod, it might have needed more attempts than really necessary. This was fixed by first disabling allocations. ([#120428](https://github.com/kubernetes/kubernetes/pull/120428), [@pohly](https://github.com/pohly))