Cut and paste this URL to share the unmodified register and value:
https://regviz.com/r/stm32/stm32h7rs/STM32H7R/FDCAN1/FDCAN_CREL#0x0
FDCAN Core Release Register
18
12
4
1
2
3
https://github.com/modm-io/cmsis-svd-stm32