"Diagram Synchronize Validation Failed" Error When Updating Threat Model

Issue

If you're trying to update your threat model and receive an error message saying "Diagram synchronize validation failed - You can not set the same component as source and target," don't worry, you're not alone. This error typically occurs when a dataflow line starts and ends in the same component. Fortunately, there is an easy fix for this issue.

Steps

1. Click on Edit in the top menu bar.
2. Select 'Select Edges'. This will highlight all of the dataflow lines in your model, making it easier to identify the problematic line(s).
3. Look for a dataflow line that starts and ends on the same component. This is the cause of the error.
4. Delete the problematic dataflow line by clicking on it and pressing the Delete key on your keyboard.
5. Attempt to update your threat model again.

Conclusion

The "Diagram Synchronize Validation Failed" error can be frustrating, but it is easy to fix once you know what to look for. By following the steps outlined above, you can quickly identify and remove the problematic dataflow line, allowing you to successfully update your threat model without further issues.