Cut and paste this URL to share the unmodified register and value:
https://regviz.com/r/stm32/stm32g0/STM32G031/FLASH/ACR#0x0
Access control register
Latency
Prefetch enable
Instruction cache enable
Instruction cache reset
Flash User area empty
Debug access software enable
https://github.com/modm-io/cmsis-svd-stm32