A simple way to clone an existing environment is to create a new environment.

#Export your active environment to a new file
conda env export > environment.yml

# Create new environment from file with newEnvironmentName environment name
conda env create --name newEnvironmentName --file=environment.yml

# OR if you want to create with the same environment name with environment.yml file
conda env create -f environment.yml

1. Source 1 - Conda Manage Environments
2. Source 2 - A Stackoverflow Answer