Flashing via S1Boot can overwrite the TA partition. This is why unlocking the bootloader via S1Boot (which standard Fastboot cannot do alone) erases DRM keys permanently on many Xperia models.
I can provide the specific commands or download links for your exact setup. s1boot fastboot driver
If you’ve ever tried to flash firmware, unlock a bootloader, or recover a Sony Ericsson (or early Sony Xperia) device, you’ve likely encountered the term . This specialized driver is essential for establishing communication between your Android device (in fastboot mode) and your Windows PC. Flashing via S1Boot can overwrite the TA partition