This has been working for like 6 months and it decided to break approximately a week ago. Basically, I am able to change brightness manually by issuing the command

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echo 512 | sudo tee - /sys/class/backlight/intel_backlight/brightness

This changes the brightness output of my Intel integrated GPU on my laptop. However, this laptop also has a dedicated NVIDIA video card which also has a backlight section:

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/sys/class/backlight/nvidia_0/brightness

The problem is that when I change the brightness using the brightness changing hotkeys, Plasma (or whatever program is responsible for changing brightness) thinks it should change the brightness in the nvidia_0 section of the backlight instead of the intel_backlight. How do I fix this?