Welcome to the Let's Encrypt Community, James
It likely means that you already have an existing version of certbot installed at:
/usr/bin/certbot
What are the outputs of:
sudo /usr/bin/certbot --version
sudo /snap/bin/certbot --version
Welcome to the Let's Encrypt Community, James
It likely means that you already have an existing version of certbot installed at:
/usr/bin/certbot
What are the outputs of:
sudo /usr/bin/certbot --version
sudo /snap/bin/certbot --version