Upgrading Your Rancher Downstream Clusters to Kubernetes v1.25
The PodSecurityPolicy API, initially deprecated in Kubernetes v1.21, was entirely removed in Kubernetes v1.25. Because the API was removed, you cannot create, edit or query PodSecurityPolicy resources in a Kubernetes v1.25 cluster. Also, because its admission controller was removed, your clusters can no longer enforce any PodSecurityPolicy rules that were created in Kubernetes v1.24 and prior.