I have this Deployment:

apiVersion: extensions/v1beta1
kind: Deployment
metadata:
  name: app-deployment
spec:
  replicas: 2
  template:
    metadata:
      labels:
        app: app
    spec:
      containers:
      - name: app
        image: 172.20.34.206:5000/myapp_img:1.0
        ports:
    - containerPort: 8080

Now, I want to upgrade the image from 1.0 to 2.0, so I do this:

$ kubectl patch deployment app-deployment -p '{"spec":{"containers":[{"name":"myapp","image":"172.20.34.206:5000/myapp_img:2.0"}]}}'

But I get this error:

Error from server: the server rejected our request for an unknown reason (patch deployments.extensions app-deployment)

If I edit the Deployment via kubectl edit deployment/app-deployment, it works properly.