You are trying to bypass certain factory locks or perform a clean install of a regional firmware that isn't standard for your device. A Word of Caution
Using Sahara-based tools is "surgery" for your phone. Because these files allow for direct memory access, using the wrong programmer or an incompatible archive can permanently damage the hardware. Always ensure the sahara.7z file matches your specific device model and chipset version. sahara.7z
These tell flashing tools (like QFIL or MiFlash) where each piece of the firmware (bootloader, recovery, system) needs to go. You are trying to bypass certain factory locks