In special cases, it may happen that tabs and icons in the version 6.0 user interface (CMS Desk, Site Manager) are duplicated. For example if you import an older site to version 6.0 or if the upgrade procedure was not followed properly during previous upgrades.
If this happens, UI elements stored in the CMS_UIElement table are created twice and displayed in the UI. To fix this issue you can apply the latest hotfix for version 6 or you can delete the elements which are duplicated by this script:
RemoveDoubledUIElements.sql The 6.0 elements have a unique ID, and the script attached will delete all elements which should not be there. As always, do not forget to create a database backup to be able to restore it if needed.
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If you
import some page templates or stylesheets into an existing installation, the import process can re-write some existing objects. It happens when:
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the objects have the same GUID-s and
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they have the same code names.
That is why it is not enough to change their code names if you want to keep the existing objects and import the new ones. The future versions will support a general Clone function for all objects.
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Unfortunately this is not possible using export/import feature. You can export all documents or no document. For single document synchronization you can use content staging module. You can find more details about this module in
'Module Content staging' chapter in Kentico CMS Developer´s guide.