[Bug 18664] New: Merging an application with itself causes all child objects to be deleted

http://bugs.winehq.org/show_bug.cgi?id=18664

Summary: Merging an application with itself causes all child
                    objects to be deleted
           Product: WineHQ Apps Database
           Version: unspecified
          Platform: Other
               URL: http://appdb.winehq.org/objectManager.php?sClass=appli
                    cation&iId=9759
        OS/Version: other
            Status: NEW
          Keywords: source
          Severity: normal
          Priority: P2
         Component: appdb-unknown
        AssignedTo: [e-mail]
        ReportedBy: [e-mail]

Just happened with this app:
http://appdb.winehq.org/objectManager.php?sClass=application&iId=9759

Rosanne had processed this app just before I opened it to process.  The result
being that the appdb found a duplicate entry: but it was the same app.
(Carelessly) I merged the app with itself, this deleted all versions and test
data.

A number of possible solution:
1. Apps shouldn't find themselves as duplicates (identifiable by their numeric
ID).
2. An error message should appear when attempting to merge an app with itself.
3. It certainly shouldn't delete all objects at a bare minimum.

Better yet of course:  Once an app is processed, attempting to process it again
should report an error and fail, e.g. "App already processed."