IndexError: Out of range: piece id is out of range. about gpt-2-tensorflow2.0 HOT 3 OPEN

run sequence_generator.py
Model weights loaded into memory
Traceback (most recent call last):

  File "G:\Repos\gpt-2-tensorflow2.0\sequence_generator.py", line 28, in <module>
    seq_gen()

  File "G:\Python\Anaconda3\lib\site-packages\click\core.py", line 1128, in __call__
    return self.main(*args, **kwargs)

  File "G:\Python\Anaconda3\lib\site-packages\click\core.py", line 1053, in main
    rv = self.invoke(ctx)

  File "G:\Python\Anaconda3\lib\site-packages\click\core.py", line 1395, in invoke
    return ctx.invoke(self.callback, **ctx.params)

  File "G:\Python\Anaconda3\lib\site-packages\click\core.py", line 754, in invoke
    return __callback(*args, **kwargs)

  File "G:\Repos\gpt-2-tensorflow2.0\sequence_generator.py", line 18, in seq_gen
    generated_seq = sg.sample_sequence(context,

  File "G:\Repos\gpt-2-tensorflow2.0\sample.py", line 117, in sample_sequence
    generated_seq = self.sp.decode_ids(pred[1:])

  File "G:\Python\Anaconda3\lib\site-packages\sentencepiece\__init__.py", line 174, in DecodeIdsWithCheck
    return _sentencepiece.SentencePieceProcessor_DecodeIdsWithCheck(self, ids)

IndexError: Out of range: piece id is out of range.

[/usr/local/lib/python3.7/dist-packages/sentencepiece/__init__.py](https://localhost:8080/#) in _func(v, n)
   1036   def _func(v, n):
   1037     if type(n) is int and (n < 0 or n >= v.piece_size()):
-> 1038       raise IndexError('piece id is out of range.')
   1039     return func(v, n)
   1040 

IndexError: piece id is out of range.