To get the latest LibreOffice version using apt-get or apt in Linux Debian Buster you need first to clean the LibreOffice installed: sudo apt remove –purge libreoffice* sudo apt clean sudo apt autoremove Then you need to add backports to your sources listhttp://backports-master.debian.org/Instructions/ then: sudo apt -t buster-backports install libreoffice
Upgrade LibreOffice by command line with Debian or Ubuntu
First download the file for your OS, then extract the DEBS Then install upgrade with this command