Cut and paste this URL to share the unmodified register and value:
https://regviz.com/r/STMicroelectronics/STM32L562/FLASH/SECWM1R1#0x0
Flash bank 1 secure watermak1 register
SECWM1_PSTRT
SECWM1_PEND
https://github.com/cmsis-svd/cmsis-svd-data