He had not just updated his console. He had turned it into a ghost in the SENTINEL’s own machine. The patched QR code wasn't a patch at all. It was a Trojan horse, hidden in plain sight as an error message. And Luma Updater v26? The "patched" version was the real weapon.
If you cannot boot your 3DS because Luma is outdated, always update manually: download the latest boot.firm from the official Luma3DS GitHub and copy it to your SD card root using a PC. No QR patch needed. luma updater 26 qr code patched