Upgrade auf Weewx 3.7.1-1 erfolgreich durchgeführt.

If you have specified the weeWX apt repository in /etc/apt/sources.list.d/weewx.list, then upgrade to the latest version like this:
sudo apt-get update
sudo apt-get install weewx

Otherwise, download the latest X.Y.Z DEB package from the Download page on weewx.com, then upgrade like this:
sudo dpkg -i weewx_X.Y.Z-R.deb