Ubuntu18.04上でanacondaを使って仮想環境を作成すると以下のようなエラーが発生します。  
何か解決策はないでしょうか？環境は作られるのですが、PATHが変な位置にあるみたいです。

**入力**

```

    conda create -n t15 python=3.6
    
```

**出力**

```

    WARNING: A conda environment already exists at '/home/user/anaconda3/envs/test'
    Remove existing environment (y/[n])? n
    
    
    CondaSystemExit: Exiting.
    
    (tf1.13) user@eins:~$ conda create -n t15 python=3.6
    Collecting package metadata (current_repodata.json): done
    Solving environment: done
    
    ## Package Plan ##
    
      environment location: /home/user/anaconda3/envs/t15
    
      added / updated specs:
        - python=3.6
    
    
    The following NEW packages will be INSTALLED:
    
      _libgcc_mutex      pkgs/main/linux-64::_libgcc_mutex-0.1-main
      ca-certificates    pkgs/main/linux-64::ca-certificates-2019.11.27-0
      certifi            pkgs/main/linux-64::certifi-2019.11.28-py36_0
      libedit            pkgs/main/linux-64::libedit-3.1.20181209-hc058e9b_0
      libffi             pkgs/main/linux-64::libffi-3.2.1-hd88cf55_4
      libgcc-ng          pkgs/main/linux-64::libgcc-ng-9.1.0-hdf63c60_0
      libstdcxx-ng       pkgs/main/linux-64::libstdcxx-ng-9.1.0-hdf63c60_0
      ncurses            pkgs/main/linux-64::ncurses-6.1-he6710b0_1
      openssl            pkgs/main/linux-64::openssl-1.1.1d-h7b6447c_3
      pip                pkgs/main/linux-64::pip-19.3.1-py36_0
      python             pkgs/main/linux-64::python-3.6.9-h265db76_0
      readline           pkgs/main/linux-64::readline-7.0-h7b6447c_5
      setuptools         pkgs/main/linux-64::setuptools-42.0.2-py36_0
      sqlite             pkgs/main/linux-64::sqlite-3.30.1-h7b6447c_0
      tk                 pkgs/main/linux-64::tk-8.6.8-hbc83047_0
      wheel              pkgs/main/linux-64::wheel-0.33.6-py36_0
      xz                 pkgs/main/linux-64::xz-5.2.4-h14c3975_4
      zlib               pkgs/main/linux-64::zlib-1.2.11-h7b6447c_3
    
    
    Proceed ([y]/n)? y
    
    Preparing transaction: done
    Verifying transaction: \ WARNING conda.core.path_actions:verify(963): Unable to create environments file. Path not writable.
      environment location: /home/user/.conda/environments.txt
    
    done
    Executing transaction: | WARNING conda.core.envs_manager:register_env(52): Unable to register environment. Path not writable or missing.
      environment location: /home/user/anaconda3/envs/t15
      registry file: /home/user/.conda/environments.txt
    done
    #
    # To activate this environment, use
    #
    #     $ conda activate t15
    #
    # To deactivate an active environment, use
    #
    #     $ conda deactivate
    
```
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2019-12-30T07:30:26.940
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2019-12-30T07:36:44.647
2019-12-30T07:36:44.647
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question
python anaconda
anacondaの仮想環境エラー