Hi, u probably set level to prefab make sure isplayset is set to off in world settings . If u wannt to have poi like playset prefab u need to create new level and copy paste assets to this new level then mark as playset name it add tag and save all, this will generate prefab .(make sure playset should not contain island settings device and also exclude static meshes) then open then go to main level and look to Prefab folder and drag playset into scene . Main island need to have island settings device and should not be playset 
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