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I tried that but there is no option for "deleteBeforeReplace"

ok, for me it just updated in place, FWIW: here is my xform:

(o: any) => {
  if (o.apiVersion) {
    const xforms: Record<string, string> = {
      "<http://rbac.authorization.k8s.io/v1beta1|rbac.authorization.k8s.io/v1beta1>":
        "<http://rbac.authorization.k8s.io/v1|rbac.authorization.k8s.io/v1>",
      "<http://apiextensions.k8s.io/v1beta1|apiextensions.k8s.io/v1beta1>": "<http://apiextensions.k8s.io/v1|apiextensions.k8s.io/v1>",
    };
    if (Object.keys(xforms).includes(o.apiVersion)) {
      o.apiVersion = xforms[o.apiVersion];
    }
  }
}