Get Nodes get "wiped" when using the save as feature - NODES 2.0

### Custom Node Testing

- [ ] I have tried disabling custom nodes and the issue persists (see [how to disable custom nodes](https://docs.comfy.org/troubleshooting/custom-node-issues#step-1%3A-test-with-all-custom-nodes-disabled) if you need help)

### Expected Behavior

When making a copy of existing workflows it is expected to keep the desired variables selected on Get Nodes.

### Actual Behavior

When making a copy of workflows, the Get Nodes lose their selected variables in Nodes 2.0.

### Steps to Reproduce

- Make sure Nodes 2.0 is enabled
- Add a Set Node and expose a variable
- Add A get node and select that variable from the dropdown
- Use the Save as feature (make a copy of the workflow)
- Notice that no variable is selected in the Get node

### Debug Logs

```powershell
NA
```

### Other

_No response_