Why : Root does not exist - curious

Neovim
1

Using neovim NVIM v0.4.3 on ubuntu 20.04
Install via apt-get
Running :checkhealth I see the following

## Python 3 provider (optional)
  - INFO: pyenv: Path: /usr/local/bin/pyenv
  - WARNING: pyenv: Root does not exist: /usr/local/bin/pyenv. Ignoring pyenv for all following checks.
  - INFO: Using: g:python3_host_prog = "/usr/bin/python3"
  - INFO: Executable: /usr/bin/python3
  - INFO: Python version: 3.8.10                                                                                                                              
  - INFO: pynvim version: 0.4.3                                                                                                                               
  - OK: Latest pynvim is installed.

I am curious as to why the “Root does not exist” warning appears.
Any edification would be appreciated.
Thanks
Tim