circular import when using caffee2 Pytorch

[PrestigeDevop]

hello , there's a bug in Anaconda packages , I installed cv2 using this command

conda install -c conda-forge opencv

then it prompt me to install custom downgraded version of anaconda by running the following command

WARNING: A newer version of conda exists. <==
  current version: 4.12.0
  latest version: 4.13.0

Please update conda by running
    $ conda update -n base -c defaults conda

when I use try to install this package by running Python init.py

cannot import name 'metanet_pb2' from partially initialized module 'caffe2.proto' (most likely due to a circular import) (D:\Anaconda\lib\site-packages\caffe2\proto\__init__.py)

Simply I want to use an old api of coffee2 and Detectron for an old project .

I think this is due to being Caffee2 integrated into Pytorch .
how to fix this issue ?