To delete an incident's history, to the following:

1. Click on the Incidents in the main navigation and then choose 'Incident Histories' from the padding menu. A screen with incidents' histories will appear.

2. Select the history you want to delete by checking the box besides, and then click 'Delete' button.

You may also choose to open the incident's history you want to delete by clicking on its title and then clicking 'Delete' button.