STM32G431 bug

[Buldakov-A]

I am configuring the stm32g431 chip to be powered by an external quartz oscillator to operate at 32 MHz.
The MCO pin must have a frequency of 16 MHz to check the correct operation of the generator settings.
Version 2 of the code works fine from an external oscillator and outputs a frequency of 16 MHz at the MCO output.
But if I remove an unused interrupt from the code, then everything stops working.
// SystemClock_Config();
//void SystemClock_Config(void)
//{}
After that, the chip starts operating from an internal generator at a frequency of 170 MHz and on the MCO pin we have a frequency equal to 85 MHz.
Version 1 of the code does not work.

STM32G431_ver1.txt
STM32G431_ver2.txt