cron_validor module not found after upgrading to Debian Bookworm

After upgrading to the latest Debian Bookworm I started getting this error message: `/usr/bin/python3 /opt/hcloud-snapshot-as-backup/snapshot-as-backup.py > /dev/null Traceback (most recent call last):` ``` File "/opt/hcloud-snapshot-as-backup/snapshot-as-backup.py", line 9, in <module> from cron_validator import CronScheduler ModuleNotFoundError: No module named 'cron_validator' ``` Then if I try to install the module cron-validator with: `pip install cron-validator` I'm getting this: ``` error: externally-managed-environment × This environment is externally managed ╰─> To install Python packages system-wide, try apt install python3-xyz, where xyz is the package you are trying to install. If you wish to install a non-Debian-packaged Python package, create a virtual environment using python3 -m venv path/to/venv. Then use path/to/venv/bin/python and path/to/venv/bin/pip. Make sure you have python3-full installed. If you wish to install a non-Debian packaged Python application, it may be easiest to use pipx install xyz, which will manage a virtual environment for you. Make sure you have pipx installed. See /usr/share/doc/python3.11/README.venv for more information. note: If you believe this is a mistake, please contact your Python installation or OS distribution provider. You can override this, at the risk of breaking your Python installation or OS, by passing --break-system-packages. hint: See PEP 668 for the detailed specification. ``` Any idea what to do? Thanks.