Left feedback for someone who cancelled order

[granandvelma]

I had 2 feedbacks and left 2 for the same item, didn't realise until I saw the 2nd showed up on my feedback list. How do I cancel the first incorrect feedback I've sent?

[ruby*tuesday]

You can't change Positive Feedback.

[granandvelma]

Is there a way to delete it, not change, but delete it totally?