Corrupt save after changing nickname

[TheStandDealer]

When I change only the Mii's nickname (I can change the pronunciation fine) in the editor, since in game it has an unchangeable defult text, it corrupts the save file "Failed to autofix checksum", leading to the curruption, and I can't repair the save in any way that I can figure out. Iv'e had to resort to saving a seperate save entity in the off chance I accidently mess something up. Anyone else have this issue or have a way to fix this? It's a little annoying to see "victor" when a Mii is talking about another but actually saying their nickname.