The centre is traditionally read as the core of the self, the still point that holds things in balance. Standing at the centre of a scene can also reflect a wish for attention, or discomfort at having it.
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.