jupyter中关于tensorflow标签重复定义问题

出现的问题如下：
DuplicateFlagError: The flag 'dev_sample_percentage' is defined twice. First from /usr/local/lib/python3.6/dist-packages/ipykernel_launcher.py, Second from /usr/local/lib/python3.6/dist-packages/ipykernel_launcher.py. Description from first occurrence: Percentage of the training data to use for validation