Looking up this type of error message I end up here. 
I have similar error message in my syslog . Seems to be related to function 
keys  like brightness or volume (hp pavilion notebook  running ubuntu 20.04 
with nvidia-drivers-460) . 
here is an example with the brightness key :
Apr 29 22:30:30 chmickmini kernel: [82648.971532] atkbd serio0: Unknown key 
pressed (translated set 2, code 0xab on isa0060/serio0).
Apr 29 22:30:30 chmickmini kernel: [82648.971536] atkbd serio0: Use 
'setkeycodes e02b <keycode>' to make it known.
Apr 29 22:30:30 chmickmini kernel: [82649.039403] atkbd serio0: Unknown key 
released (translated set 2, code 0xab on isa0060/serio0).
Apr 29 22:30:30 chmickmini kernel: [82649.039405] atkbd serio0: Use 
'setkeycodes e02b <keycode>' to make it known.
Apr 29 22:30:30 chmickmini gnome-shell[1839]: Window manager warning: 
Overwriting existing binding of keysym 73 with keysym 73 (keycode 27).
Apr 29 22:30:30 chmickmini gnome-shell[1839]: Window manager warning: 
Overwriting existing binding of keysym 31 with keysym 31 (keycode a).

hope this help

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https://bugs.launchpad.net/bugs/1857392

Title:
  Window manager warning: Overwriting existing binding of keysym 37 with
  keysym 37 (keycode 10).

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