To delete a lab, use the Delete lab option on the Lab list page.
If there is an active prepopulated lab template or an entitlement for a lab, you cannot delete the lab. If you cannot delete a lab, try the following solution:
Ensure that the lab is active and prepopulated lab template are active.
Go to the Prepops page and set the value to 0 (zero).
Enable and acknowledge all alerts.
On the Labs list page, click the three ellipses next to a lab, and click Delete.