Why is ApplyParameterOverride() on Action not working?

I am simply trying to change the scroll speed for my mouse input.

Here's my input asset, showing the processor being setup with a default value of 10:
9205593--1284159--Capture d’écran 2023-08-09 à 16.28.05.jpg

Then here's the code that runs once my GameSetting file is loaded:
9205593--1284162--Capture d’écran 2023-08-09 à 16.29.18.jpg

And here's the console results, showing that no override has been applied:
9205593--1284165--Capture d’écran 2023-08-09 à 16.30.26.jpg

Is there anything else that I should do in order to override a processor??

My MouseScrollScale variable is of type float

I have tried to apply to both the class (C# file generated) or to the .asset directly, none of them work