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admissionregistration.k8s.io/v1beta1 → admissionregistration.k8s.io/v1
extensions/v1beta1 and networking.k8s.io/v1beta1 → networking.k8s.io/v1
apiextensions.k8s.io/v1beta1 → apiextensions.k8s.io/v1
etc.
The guide indicates to migrate manifests and API clients to use the v1 API version instead of v1beta1. You also must make changes to some values names and defaults.
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