Boot into your 9.8 emunand, start FBI and delete all theses titles (in NAND mode) :
['0004001000020000', '0004001000020100', '0004001000020200', '0004001000020300', '0004001000020400', '0004001000020500', '0004001000020700', '0004001000020800', '0004001000020900', '0004001000020A00', '0004001000020B00', '0004001000020D00', '0004001000020E00', '0004001000020F00', '0004001000023000', '0004003000008202', '0004003000008402', '0004003000008602', '0004003000008702', '0004003000008802', '0004003000008D02', '0004003000008E02', '000400300000C002', '000400300000C003', '000400300000C102', '000400300000C302', '000400300000C402', '000400300000C602', '0004009B00011902', '0004009B00012202', '0004009B00013202', '0004009B00015202', '000400DB00016202', '000400DB00017202']
(got them from here :
https://gbatemp.net/threads/release...is-safe-to-delete-after-region-change.383796/)