If you do not want an additional detail field to be displayed when adding a new vehicle, you can inactivate it or delete it. However, you cannot delete an additional detail field that has already been used to record vehicle information.
At the top of your dashboard, click the module access icon 
Click Edit beside the additional detail field you want to edit, select the Inactive status, and then click the Update button. Additional detail fields that are inactivated are moved under the Inactive fields list.
Click Delete beside the additional detail field you want to delete.
For more information, watch this :
Was this article helpful?
That’s Great!
Thank you for your feedback
Sorry! We couldn't be helpful
Thank you for your feedback
Feedback sent
We appreciate your effort and will try to fix the article