Cut and paste this URL to share the unmodified register and value:
https://regviz.com/r/stm32/stm32f0/STM32F0x1/NVIC/IPR1#0x0
Interrupt Priority Register 1
PRI_40
PRI_41
PRI_42
PRI_43
https://github.com/modm-io/cmsis-svd-stm32