Remove existing LibreOffice
sudo apt remove libreoffice*
sudo apt autoremove
Add Debian backports to sources list,
sudo mousepad /etc/apt/sources.list
Add the following line at the end of the sources list,
deb http://deb.debian.org/debian buster-backports main
Save and close the file,
Update the repository and install LibreOffice
sudo apt-get update
sudo apt-get -t buster-backports install libreoffice
Information courtesy: Subeesh Gopinathan