AH WORKING !
I'm in menu with 2 choice, press Y to apply patche and reboot into rxmode on emunand or press X to apply patche and reboot the console into rxmode on sysnand
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I'v press Y and i'm return to homemenu after
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"***At this point, you may update your emunand to 10.3 before continuing to step 4a (specifically), although you don't have to if everything works out. Read the guidelines below in the emunand section first."