PWM fan not shutting off at 0% on BTT M8p board

Installed the BTT Manta M8p 1.1 board today, run through the config and its all set up. Trying to run an Arctic Cooling 4028 fan. Its PWM and connected to the correct socket on the board. I can control it fine so its all connected to the right pins and linked the 25khz part cooling fan cfg, but at 0% it still spins at 1100rpm which is the min value in the datasheet. But i want it to turn OFF at 0%.
I saw a section for the issue on the "connecting a 4028 fan" page of the RATOS setup guide but it says about using the enable_pin option in klipper. But when i go to use the pin (PB8) it gives the error: pin PB8 is an alias for 4p_fan_part_cooling_pin.

What do i need to add or edit to get it to turn the fan off when set to 0%?

printer.cfg attached. Thank you

printer.cfg13.02KB