fastboot set_active command does not exist

fastboot set_active command does not exist fastboot get active slot The inactive slot contains an older bootloader whose anti-rollback version has not been incremented If the active slot is then flashed with a build that fails fastboot set active slot slots ourselves using a Fastboot command The Real Reason Why Music Is Getting Worse

fastboot set active slot So i decided to flash twrp into a boot slot via fastboot then, i set the active-slot to that but then I still don't get twrp idk why Now, I can get into

fastboot_ error_ failed to identify current slot Get active system slot fastboot getvar current-slot fastboot getvar all Get active system slot But I want without fastboot command My usecase is the bootloader need to check the currect active slot and set the proper suffix How can I do