Cut and paste this URL to share the unmodified register and value:
https://regviz.com/r/stm32/stm32l4/STM32L412/PWR/SCR#0x0
Power status clear register
Clear wakeup flag 1
Clear wakeup flag 2
Clear wakeup flag 3
Clear wakeup flag 4
Clear wakeup flag 5
Clear standby flag
https://github.com/modm-io/cmsis-svd-stm32