Patur-
Generally when someone changes a girsa it means that there was a mistake and people had the wrong girsa. It does not matter who they are as it is not a chisaron in them. Unless it is just a ???? ??, but when you are coming from kisvei yad that are neeman (such as this case) then it means we change the girsa. Besides the Adnei yad hachazaka on hebrewbooks and others there also change the girsa.