Question Why is my CPU light ON on the motherboard?

Feb 27, 2021
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I just built my new pc:
CPU: AMD RYZEN 5 5600x
Motherboard: MSI tomahawk max b450
Cooler: Liquid freezer II - 120

I updated the bios, I have plugged the cooler in to the CPU fan and the light for CPU is red!! I don't know if its anything wrong and how to turn it OFF.

P.S. The PC works fine and temps are normal.