As a user, I would the ability to correct mistypes in Estimations without a spike in the Burndown Chart

When a mistype in the Original Estimate field is made and it is corrected(say from 9weeks to 9hours) there is still a spike in the Burndown Chart.

This feature request is open to look into the possibility of having a way to remove the initial Original Estimate value so it does not affect the Burndown Chart.