A poster on the wall is read as an ideal or idol you look up to, often from younger years. A faded or torn poster stands for admiration you have outgrown.
Has this come up in your dreams before? What was going on in your life then?
My Cosmic Code has a private dream journal. Write a dream down and the app picks out the symbols in it, shows what dream books say about them and, over time, which words recur across your entries. The journal is stored on your device only.