[whpalmer4]

Once you've reset your database on the Mac, use File->Replace Server Database... to upload the new database to the server. The next time you sync the other clients, you'll get a query as to whether to keep the device database or the sync database, and you should take the sync database. The query happens because OmniFocus recognizes that the sync database and the device database are no longer related and wants to make sure you intend to make such a change.