Cut and paste this URL to share the unmodified register and value:
https://regviz.com/r/Keil/AT32F425xx_v2/FLASH/SLIB_STS0#0x0
sLib status 0 register
Boot memory store application code enabled flag
Extension memory sLib enabled flag
sLib enabled flag
Extension memory sLib instruction start sector
https://github.com/cmsis-svd/cmsis-svd-data