FAILED (remote: 'Flashing is not allowed in Lock State') - Fastboot giving an error when I try to flash TWRP

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Hi, I'm trying to get TWRP flashed onto my device (model number G8441), but when I try to flash it with fastboot it spits out an error:> fastboot flash recovery twrp.imgSending 'recovery' (33688 KB) OKAY [ 0.885s]Writing 'recovery' FAILED (remote: 'Flashing is not allowed in Lock State')fastboot: error: Command failedI'm using https://twrp.me/sony/sonyxperiaxz1compact.html (if it helps, I wanted to flash...Read more