Overwrite

Items with the same ID (along with any existing children) will be replaced by items from the package.

Merge

Existing item (and its descendants) is preserved with the following options:

Clear - all existing versions for a language of the item being installed are removed prior to adding new versions.

Append – item versions from the package are added 'on-top' of the existing versions of the item. This preserves history, but numbers the package versions with numbers higher than the existing version numbers. A user can merge information between versions afterwards.

Merge - if there is a version with the same number in the item, the Installation Wizard will overwrite it, otherwise a new version with the specific number is added. This makes it possible to replace specific versions of items.

Skip

Items with the same ID from the target database will remain unchanged; items from the package will be skipped.

Ask User (default)

Prompt window will appear if items with the same ID are found: