1. To delete a single filter version, open that version record and click Delete .The system hides the Delete button for filters thatare in use. If you delete the latest version of a filter that is active, theprevious version of that filter is reset to Active.
2. To delete all unused and inactive versions of a filter, open any version of that filter and click Delete inactive versions under Related Links . Figure 1. Desired State Filter Delete All
3. https://docs.servicenow.com/bundle/london-servicenow-platform/page/product/compliance/image/DesiredStateFilterDeleteAll.png
4. When prompted, click OK to proceed. The system deletes unused filter versions. A message in the header bar identifies filter versions that cannot be deleted because they are used in a template or scripted audit. Figure 2. Desired State Filter Delete
5. https://docs.servicenow.com/bundle/london-servicenow-platform/page/product/compliance/image/DesiredStateFilterDelete.png