conda update/install报错：The environment is inconsistent, please check the package plan carefully

背景：conda update conda,conda install anacondat 均报错报错：

WARNING conda.base.context:use_only_tar_bz2(632): Conda is constrained to only using the old .tar.bz2 file format because you have conda-build installed, and it is <3.18.3.  

Solving environment: /
The environment is inconsistent, please check the package plan carefully

 

1 查看anaconda/conda版本：conda list

anaconda  2019.03     
conda  4.7.5
conda-build  3.17.8

2 尝试方法  conda update conda-build   conda update --all仍然报如上错误

3 解决方案：conda install --only-deps anaconda=2019

https://github.com/conda/conda/issues/8842

https://github.com/conda/conda/issues/8490

4 查看更新记录：conda list -r

2020-04-11 19:42:40  (rev 8)
     anaconda  {2019.03 -> custom}
     conda  {4.7.5 -> 4.8.3}
     conda-build  {3.17.8 -> 3.18.11}