I also have this error since I installed F32 beta. It pops up everytime on startup. (Three times in my case always).
The problem reporting app does not report it directly and says that -
The backtrace does not contain enough meaningful function frames to be reported. It is annoying but it does not necessary signalize a problem with your computer. ABRT will not allow you to create a report in a bug tracking system but you can contact kernel maintainers via e-mail.
It gives the reason as -
WARNING: CPU: 1 PID: 1009 at drivers/gpu/drm/nouveau/nvkm/subdev/bar/g84.c:35 g84_bar_flush+0xae/0xc0 [nouveau]
command line -
BOOT_IMAGE=(hd0,gpt6)/vmlinuz-5.6.0-0.rc7.git0.2.fc32.x86_64 root=/dev/mapper/fedora_localhost--live-root ro resume=/dev/mapper/fedora_localhost--live-swap rd.lvm.lv=fedora_localhost-live/root rd.lvm.lv=fedora_localhost-live/swap rhgb quiet