Somehow the shortcut for shading/rolling up a window has been set to Ctrl+Alt+S in my Ubuntu 20.04.
I don't need the Ctrl+Alt+S shortcut for the shading action, since it clashes with the standard PyCharm shortcut for Settings. I have found this similar question, but it doesn't seem to work in 20.04: How do I disable Ctrl+Alt+s to minimize a window?
I also didn't find a way to change the shortcut using GNOME Tweaks.
So how can I change or delete the shortcut used to shade/roll up a window?