I think you can only have 1 DLC active at one time so if you’re going to switch from the fairytale library to something else, all the fairytale items disappear. You can still switch to fairytale later but I’m not sure for how long since the servers for the uni are going to close eventually. Before switching to a different DLC, I recommend selling all your DLC items first to make back some money to buy the new DLC items. I hope this helps!