How can we change the runtimeclass of already running pods. When i add runtimecl . . .

Sohail Arham:
How can we change the runtimeclass of already running pods. When i add runtimeclass: myclass with k edit pods xxx. it gives me an error.

Jia:
do–> kubectl get pod <> -o yaml > pod.yaml
in pod.yaml change in spec and then delete the existing pod and recreate from above pod.yaml