A mutiny is read as rebellion against authority or against your own inner rules. Tradition links it to resentment that has built up, and to parts of you refusing to follow the current course.
When this appeared in your dream, what were you feeling?
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.