Since quite some time, I get several lines of
F: Ignoring duplicate content rating
before any reasonable output, when I run flatpak commands, like list or update. I am using EndlessOS, which is using flatpak by default and I tried to get help on their community platform see Flatpak complains: "F: Ignoring duplicate content rating" - how to get rid of this - help - Endless Community, but apparently nobody has an idea there …
Any help is appreciated.