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Packaging Error: An item with the same key has already been added

In my project I am consistently receiving this error,

“PackagingResults: Error: System.ArgumentException: An item with the same key has already been added.
UATHelper: Packaging (Windows (64-bit)): AutomationTool exiting with ExitCode=1 (Error_Unknown)
UATHelper: Packaging (Windows (64-bit)): BUILD FAILED
PackagingResults: Error: Unknown Error”

I tried every solution from the forums, like deleting saved and intermediate folders, checking the plugins if duplicate, and so on. None of the solution worked for me. Basically, I got stuck about a week.

Using 4.26. Any help welcome. Thanks.