MCU 'mcu' configured for 72Mhz but running at 150Mhz!

General Discussion
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Basic Information:

Printer Model: Ender 3
MCU / Printerboard: 4.2.7 board
Host / SBC: Raspberry Pi 4
klippy.log
klippy.log (321.2 KB)

Describe your issue:

Fluidd gives me a warning “MCU ‘mcu’ configured for 72Mhz but running at 150Mhz!”. This is a new issue. It happened for the first time of me using Klipper since 2022. No changes in printer firmware. It’s a 4.2.7 silent board, so it’s a STM32F103 with 28kB bootrom and Serial on USART1 PA10/PA9.

I tried to flash a new firmware with the same parameters, didn’t fix.

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