I originally got my 3DS XL in the summer of 2012. I did not link my Club Nintendo account till June of last year. I have had no problem. Today I made a miiverse account because I want to get "Legend of Zelda: Four Swords Adventure" as well as the "Bravery Default" demo. I make the account, sign in and it asks me to link a club nintendo account. I try to but I get this error;
Error Code: 011-6989
The club nintendo credentials you entered are already linked to a nintendo network ID. You cannot link a single club nintendo account to multiple Nintendo Network IDs.
This also adds the problem of not being able to access the eshop unless I am signed in. Any help is MUCH appreciated.