What is the config to determine pod to call mutatingwebhook for inject sidecar?

I have perform the canary upgrade from 1.6.13 to 1.7.5. And then I have perform the delete command for uninstall 1.7.5 component. However, after the application restart, in deployment log occur below error:

message: 'Internal error occurred: failed calling webhook "sidecar-injector.istio.io":
  Post https://istiod-1-7-5.istio-system.svc:443/inject?timeout=30s: service "istiod-1-7-5"
  not found'

The pod still try to invoked 1.7.5 istio endpoint to inject sidecar … where can I config the pod to invoked 1.6.13 endpoint i.e. mutatingwebhook?

if you are using the revision labels on the namespace, modifying that should fix it. Or take a look at the mutatingwebhookconfiguration object and edit that.