Traceback (most recent call last):

  File "<ipython-input-1-231dfe0c0437>", line 1, in <module>
    runfile('C:/Python/cig_dbbuilding/results_upload_to_mongo_walk.py', wdir='C:/Python/cig_dbbuilding')

  File "C:\Users\micha\Anaconda3\lib\site-packages\spyder_kernels\customize\spydercustomize.py", line 827, in runfile
    execfile(filename, namespace)

  File "C:\Users\micha\Anaconda3\lib\site-packages\spyder_kernels\customize\spydercustomize.py", line 110, in execfile
    exec(compile(f.read(), filename, 'exec'), namespace)

  File "C:/Python/cig_dbbuilding/results_upload_to_mongo_walk.py", line 394, in <module>
    main()

  File "C:/Python/cig_dbbuilding/results_upload_to_mongo_walk.py", line 353, in main
    dot_four(client, f, year)

  File "C:/Python/cig_dbbuilding/results_upload_to_mongo_walk.py", line 215, in dot_four
    lambda race: (

  File "C:\Users\micha\Anaconda3\lib\site-packages\pandas\core\groupby\groupby.py", line 737, in apply
    return self._python_apply_general(f)

  File "C:\Users\micha\Anaconda3\lib\site-packages\pandas\core\groupby\groupby.py", line 742, in _python_apply_general
    keys, values, mutated = self.grouper.apply(f, self._selected_obj, self.axis)

  File "C:\Users\micha\Anaconda3\lib\site-packages\pandas\core\groupby\ops.py", line 237, in apply
    res = f(group)

  File "C:/Python/cig_dbbuilding/results_upload_to_mongo_walk.py", line 220, in <lambda>
    .to_dict(orient="index")

  File "C:\Users\micha\Anaconda3\lib\site-packages\pandas\core\frame.py", line 1376, in to_dict
    raise ValueError("DataFrame index must be unique for orient='index'.")

ValueError: DataFrame index must be unique for orient='index'.