Dynamodb Data modeling

Hey there i am new at dynamoDB. I am a bit confused regarding 1 to Many relation and data duplication in dynamodDB. i have search in documentaion regarding data modeling there i found social media example of data modeling example following is the screen shot i have attaced . .. So according to the example in the red mark the PK is userId i.e u#12345#following and the user who are following is in the SK. So if you want to getFollowerListByUserID so to get a list of users who are following a given user, we'll need to Query the base table with a key condition of PK=<userID>#follower. By this example we can get list of all users id who are following u#12345. but on the real world scenario we not only want the id we also want data also . like follower name, image, profile data like all these thing to show on frontend side. but on this example there is no data attached of followers. if i also attached the data on the follower items then there would be data duplication around every item user is following some one. and if user update his data he also need to update data on every follower item.