Cut and paste this URL to share the unmodified register and value:
https://regviz.com/r/stm32/stm32g0/STM32G051/FLASH/PCROP2BER#0x0
FLASH PCROP2 area B end address register
PCROP2B area end offset, Bank 2
https://github.com/modm-io/cmsis-svd-stm32