Cut and paste this URL to share the unmodified register and value:
https://regviz.com/r/stm32/stm32h5/STM32H533/OTFDEC/OTFDEC_R3NONCER1#0x0
OTFDEC region 3 nonce register 1
Region nonce, bits [63:32]
https://github.com/modm-io/cmsis-svd-stm32