Cut and paste this URL to share the unmodified register and value:
https://regviz.com/r/Silicon Labs/Series1/EFM32GG11B/EFM32GG11B820F2048IQ64/RMU/LOCK#0x0
LOCKKEY=UNLOCKED
Configuration Lock Register
Configuration Lock Key
0 (UNLOCKED): undefined
1 (LOCKED): undefined
https://github.com/cmsis-svd/cmsis-svd-data