kubectl apply ingress: Unknown field error

I have ingress as:

apiVersion: networking.k8s.io/v1
kind: Ingress
metadata:
  name: mongoexpress-ingress
spec:
  rules:
  - host: mylocalmongoexpress.com
    http:
      paths:
      - backend:
          serviceName: mongoexpress-service
          servicePort: 8081

When I run ‘kubectl apply -f mongoexpress-ingress.yaml’, I get error:

error: error validating "mongoexpress-ingress.yaml": error validating
data: [ValidationError(Ingress.spec.rules[0].http.paths[0].backend):
unknown field "serviceName" in
io.k8s.api.networking.v1.IngressBackend,
ValidationError(Ingress.spec.rules[0].http.paths[0].backend): unknown
field "servicePort" in io.k8s.api.networking.v1.IngressBackend,
ValidationError(Ingress.spec.rules[0].http.paths[0]): missing required
field "pathType" in io.k8s.api.networking.v1.HTTPIngressPath]; if you
choose to ignore these errors, turn validation off with
–validate=false

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Going through online resources, I couldn’t find issue in yaml file.

So what am I missing here?

>Solution :

Ingress specification has changed from v1beta1 to v1. Try:

...
spec:
  rules:
  - host: mylocalmongoexpress.com
     http:
      paths:
      - path: /
        pathType: Prefix
        backend:
          service:
            name: mongoexpress-service
            port:
              number: 8081