Anaconda 创建环境时出现错误：UnavailableInvalidChannel: HTTP 404 NOT FOUND for channel

Anaconda 创建环境时出现错误：UnavailableInvalidChannel: HTTP 404 NOT FOUND for channel

我在下载pytorch-cpu的时候出现错误
报错信息：

Collecting package metadata (current_repodata.json): failed

UnavailableInvalidChannel: HTTP 404 NOT FOUND for channel anaconda/pkgs/free <https://mirrors.ustc.edu.cn/anaconda/pkgs/free>

The channel is not accessible or is invalid.

You will need to adjust your conda configuration to proceed.
Use `conda config --show channels` to view your configuration's current state,
and use `conda config --show-sources` to view config file locations.
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我尝试过修改channel的办法，未成功
或许是使用命令不匹配确，我执行如下命令后下载成功

pip install torch==1.8.0+cpu torchvision==0.9.0+cpu torchaudio==0.8.0 -f https://download.pytorch.org/whl/torch_stable.html
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