Cut and paste this URL to share the unmodified register and value:
https://regviz.com/r/stm32/stm32h7rs/STM32H7R/DBGMCU/DBGMCU_PIDR0#0x0
PARTNUM=B_0x0
DBGMCU peripheral identity register 0
Part number field, bits [7:0]
0 (B_0x0): DBGMCU
https://github.com/modm-io/cmsis-svd-stm32