Netbox version upgrade manul update

[netbox-elisa]

Hello

if you install netbox by download archive method and later on want to upgrade it with the latest release download, then there is a step missing in the manual.
Current:

Set $NEWVER to the NetBox version being installed

NEWVER=3.5.0
wget https://github.com/netbox-community/netbox/archive/v$NEWVER.tar.gz
sudo tar -xzf v$NEWVER.tar.gz -C /opt
sudo ln -sfn /opt/netbox-$NEWVER/ /opt/netbox

And after that there are copying the required files. If you dont unlink the old version, you will end up with a broken system. I tried it, upgrade it from 3.7.0 to 3.7.1 and 3.7.2. The upgrade process is successful but the services wont start. The upgrade.sh output starts with:
Using Python 3.10.12
Removing old virtual environment...
Creating a new virtual environment at /opt/netbox-3.7.0/venv...
Updating pip (pip install --upgrade pip)...
Requirement already satisfied: pip in ./venv/lib/python3.10/site-packages (22.0.2)

so the virtual environment is created in the old location and the 3.7.1 or 3.7.2 will not have venv folder.

To fix this, there should be a step in the manual:
unlink /opt/netbox
before linking the new version to /opt/netbox. After that the upgrade process is successful.