Kubernetes says 'Deployment.apps "myDeploy" is invalid' after I deleted duplicated name of volumes

I had a Deployment, and a part of it was like this after a few update:

    spec:
      containers:
      - image: myImage
        name: myImage
        volumeMounts:
        - name: data
          mountPath: /opt/data
      volumes:
      - name: data
        configMap:
          name: configmap-data
      - name: data
        configMap:
          name: configmap-data

then I found that the Deployment had duplicated volumes so I deleted one:

    spec:
      containers:
      - image: myImage
        name: myImage
        volumeMounts:
        - name: data
          mountPath: /opt/data
      volumes:
      - name: data
        configMap:
          name: configmap-data

However, after that I could not apply/patch new Deployment. It said:

cannot patch "myDeploy" with kind Deployment: Deployment.apps "myDeploy" is invalid: spec.template.spec.containers[0].volumeMounts[0].name: Not found: "data"

I would like to solve this without downtime. How can I do this?