Hello, I managed it downgrading the 2 libs and using those from ubuntu
https://ubuntu.pkgs.org/20.10/ubuntu-universe-amd64/python3-libtorrent_1.2.5-1.2_amd64.deb.html https://ubuntu.pkgs.org/20.10/ubuntu-universe-amd64/libtorrent-rasterbar10_1.2.5-1.2_amd64.deb.html apt list --installed | grep libtorrent libtorrent-rasterbar10/now 1.2.5-1.2 amd64 [installé, pouvant être mis à jour vers : 1.2.9-0.1] libtorrent-rasterbar9/stable,now 1.1.11-2 amd64 [installé] python3-libtorrent/now 1.2.5-1.2 amd64 [installé, pouvant être mis à jour vers : 1.2.9-0.1] sudo apt-mark hold libtorrent-rasterbar10 libtorrent-rasterbar10 passé en figé (« hold »). sudo apt-mark hold python3-libtorrent python3-libtorrent passé en figé (« hold »). it remains only one harmless error deluge Unable to initialize gettext/locale! 'ngettext' Traceback (most recent call last): File "/usr/lib/python3/dist-packages/deluge/i18n/util.py", line 118, in setup_translation builtins.__dict__['_n'] = builtins.__dict__['ngettext'] KeyError: 'ngettext' And Deluge is ready with my locak preferences