apt spewing warnings after libreoffice update

Solution 1:

Libreoffice 5.3 was released (today) and does not support all languages yet. For example German is not supported*. I think this might cause the problem. Sadly, the human theme was also removed (why?), so I decided to

• switch back to Libreoffice 5.2
• Remove ppa:libreoffice/ppa

• and choose the one for 5.2:

  sudo add-apt-repository ppa:libreoffice/libreoffice-5-2
  

  sudo apt-get update

If you made the same mistake as I did, and already upgraded to 5.3, you have to run:

sudo apt-get remove --purge libreoffice-core libreoffice-common
sudo apt-get autoremove --purge

and reinstall LibreOffice. The problem lines no longer appear.

*https://wiki.documentfoundation.org/ReleaseNotes/5.3/de#Lokalisierung

Solution 2:

This problem was apparently fixed today, 3rd April 2017. From an older comment of mine:

Those warnings are probably due to a minor bug in the package, which will hopefully be fixed in a future version. Meanwhile, they can safely be ignored, especially if the package is not installed.