So what? Yes, when you acheived your dream, you need a different dream. That is not a fundamentally bad thing right? The fact that you find your current "dream" reality annoying is a sign that you have become and yes it is okay to dream again but that doesn't mean your previous dream was wrong or faulty or unrealistic.

Thinking perfection as a real thing to achieve is not good but striving an ideal version of you is how you grow. Your ideal version changes as you grow its natural.