Looks like SafeyUpdater Checks for 9.1 md5 sums for japan consoles i believe. You could just use the "normal" SysUpdater and update to 9.2.
But to be honest, you dont want to risk bricking your N3DS just for updating to 9.2 if youre already on 9.1.
Get emunand, reinand cfw and update the emunand...