Keyboard shortcut issue

Hello,
I'm on windows 10 with resolv 19. As you can see in the image below, the shortcut ctrl+PgnDown is supposed to be assigned to "Timeline Thumbnail Mode", but it's not the case. The problem is that I'd like to use this keyboard shortcut for another use and I can't because resolv returns the shortcut is already in use.
Any workarounds would be graciously appreciated.

I'm on windows 10 with resolv 19. As you can see in the image below, the shortcut ctrl+PgnDown is supposed to be assigned to "Timeline Thumbnail Mode", but it's not the case. The problem is that I'd like to use this keyboard shortcut for another use and I can't because resolv returns the shortcut is already in use.
Any workarounds would be graciously appreciated.
