Jumping revs vfr 800

The problem appeared overnight. Saturday was driving perfectly, but Sunday morning the problem reappeared. It behaved normally three times, the idle was stable, and I drove. If it starts, that's the cause. It only started with the hood open, where it immediately revved up. I've never seen a similar problem or such a variable idle anywhere else. The fuses are good, the pump is turning on, and nothing was done before the problem occurred. Does anyone have any ideas or have seen such a high idle?

Best regards.