MainFrameActions: Packaging (Windows (64-bit)): Program.Main: ERROR: AutomationTool terminated with exception: System.ArgumentException: An item with the same key has already been added

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Hey Jun Bin,

Here are a few Answerhub threads where users have experienced this issue that you can use for reference as far as how to resolve your issue:

If you do not find your answer in one of those threads, you can also google your error message to get more results.

Finally, if you resolve your error and still experience a packaging failure, please provide me with the full output log.

Have a great day