Can I use Element Manager to transfer and update existing items?
Browser User Interface (BUI), Element Manager
When trying to import elements that exist in the site in BUI, this message is received:
"This item already exists on the site"
Element Manager in its current state does not support versioning, and therefore has been limited to permitting the import of new elements only.
Element Manager can not be used to update existing workspaces, reports, custom objects, custom object event handlers. At the present time the best method of transport of these items will be the use of existing workspaces with import and export options.