Cut and paste this URL to share the unmodified register and value:
https://regviz.com/r/stm32/stm32n6/STM32N645/SYSCFG/SYSCFG_INITSVTORCR#0x0
SYSCFG Cortex-M55 SVTOR control register
Secure vector table base address
https://github.com/modm-io/cmsis-svd-stm32