Run the Duplicate Checklists Report
This report shows you any checklist that has more than 1 type of the hostname and checklist type, web or database, and the site and instance fields filled in. This should be a rare occurence if it happens at all.
Where the Data Comes From
This data comes from all active checklists in your system package (i.e. you have not deleted them).
Why Run this Report
If you feel there is a duplicate checklist based on the uniqueness of hostname, checklist type, web / database / application, site and instance fields of the checklist.