To delete a resource, the resource in question must be a Draft . The resource is in Draft status if:
Re-drafting and deleting a custom resource are sensitive operations which can impact other resources. These actions must be performed by an expert user only.
Publish the resource. For more detailed steps, refer to Publishing a custom resource.
If a field of a custom resource used on an event is modified or deleted, the corresponding event will automatically be unpublished. See Configuring Transactional messaging.