A label that has favourite forms associated with it cannot be deleted.
Filtering your favorite forms
2
Navigate to Forms Library and open the Labels tab. Hover over the now empty label and click the trash can icon to Delete the label.
Deleting a favorites label
3
A confirmation pop-up window will appear. Click OK to permanently delete the label.
Note
If there are still forms associated with this label, an error message will appear. Return to Step 1 and check if all forms have been removed from the label.