Johannes Tobiassen Langvatn

### What happened? [/data/common/miniforge3/envs/wp3/lib/python3.11/site-packages/cfgrib/xarray_plugin.py:131](http://localhost:5678/data/common/miniforge3/envs/wp3/lib/python3.11/site-packages/cfgrib/xarray_plugin.py#line=130): FutureWarning: In a future version of xarray decode_timedelta will default to False rather than None. To silence this warning, set decode_timedelta to True, False, or a...

Error message from poetry self add referencing pyproject.toml

3

### Description After uninstalling and installing poetry I want to add poetry-plugin-shell to my "main" poetry, but I get an error message claiming poetry-plugin-shell is already present in the pyproject.toml....