Hello

about these 3 lines, they meant to be used to install Kstars, not update it
sudo apt-add-repository ppa:mutlaqja/ppa
sudo apt-get update
sudo apt-get install indi-full kstars-bleeding

To update the software, you need these 2 lines
sudo apt update
sudo apt upgrade

The "upgrade" line is meant to update the softwares.

Valentin

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