ode>, <code>RequestAuthentication</code> and <code>AuthorizationPolicy</code>) helped standardize how we define policy targets in Istio, helped users understand where policies were applied, and cut the number of configuration objects required.</p><p>The old APIs were deprecated in Istio 1.4. Two releases after the <code>v1beta1</code> APIs were introduced, Istio 1.6 removed support for the <code>v1alpha1</code> APIs.</p><p>If you are using a version of Istio prior to 1.6 and you want to upgrade, you will ha