When you delete a Group, make sure to move all Users in that Group to another Group, otherwise they will not be able to use Vernon CMS.
You will also need to edit Superior Groups to make sure they will have the correct rights after this Group has been deleted.
To delete a Group
1.Go to Tools menu > System Maintenance > Security Tool > Groups.
2.Opening the Group record you want to delete.
You can either type the Group name into the Search bar or click the Advanced Search button 
to choose your Group from a list.
3.Go to File > Delete.
4.Click No for checking if the record is in use, then click OK to delete the entry.
