python – Activating venv and conda environment at the same time

I am a beginner and was “playing around” with environments a bit. I came across a situation where it seemed that I had two environments activated:
I create a directory, create an environment with venv, activate it and then also conda activate a conda environment which I created before. These are the commands:

mkdir dummie_directory
cd dummie_directory
python -m venv .
Scripts\activate
conda activate old_env

After this the beginning of my command line looks like this:

(old_env)(dummie_directory) C:\Users\....

Does this mean that both environments are active?
Is there any intended use for this or will it most likely lead to some kind of clash/conflict between the installed packages?

Thanks