ERROR: Cannot uninstall 'ruamel-yaml'. It is a distutils installed project and thus we cannot accurately determine which files belong to it which would lead to only a partial uninstall

[tanayraj (Tanayraj Jhagadiawala)]

for me pip install rasa --user --ignore-installed ruamel.yaml and pip install rasar --ignore-installed ruamel.yaml did not work.

I suggest doing manually.

rm -rf /path/to/anaconda3/lib/python3.7/site-packages/ruamel*