Disconnect Nintendo Account?

You can link a user to the Nintendo Account on their Nintendo Switch. I'm currently looking for a way to delete this link without losing all my data…

You could theoretically delete the user, but if I do that, then I will completely lose all data of all games that I played with the user, eg on Minecraft all my worlds…

Well now I idiot connected the account with the wrong user on the switch. But I don't want to lose all my data…

Can you break this link by deleting the Nintendo Account? (When he's gone, it's half as wild at first) And still keep his data at the same time? They get me so excited, please help

Somehow it has to work.

The only way to break the link is to delete the user. But I think it was possible to link the same account to multiple users.