Maybe not an answer but probably still a way to achieve what you want: I would usually use a python virtual environment and pip instead of anaconda. Never had a problem with that. This should be able to help: https://www.geeksforgeeks.org/python/using-mkvirtualenv-to-create-new-virtual-environment-python/

Generally speaking, when working with various versions of python, you must create a virtual environment (with conda or pip, both have that feature). Otherwise, things can get very messy.