Cut and paste this URL to share the unmodified register and value:
https://regviz.com/r/stm32/stm32n6/STM32N645/FDCAN1/FDCAN_CREL#0x0
FDCAN core release register
Timestamp day =18
Timestamp month = 12
Timestamp year = 4
Sub-step of core release = 1
Step of core release = 2
Core release = 3
https://github.com/modm-io/cmsis-svd-stm32