This thing keeps showing up.
I did check the documentation and found this
-wget -nv https://download.owncloud.org/download/repositories/9.1/Ubuntu_16.10/Release.key -O Release.key
-apt-key add - < Release.key
-sh -c "echo 'deb http://download.owncloud.org/download/repositories/9.1/Ubuntu_16.10/ /' > /etc/apt/sources.list.d/owncloud.list"
-apt-get install owncloud-files
-apt-get install owncloud
and rebooted to check if it was fixed, but still getting the same message.