Containers are objects, and follow the same rules as described in as described in Replacing Single Objects. If a container already exists in the target database, should the container's content in the packager replace the existing container's content? There are two options available. The replace option replaces the folder and its content. The append option replaces the folder and appends the content in the packager to the existing content in the folder.
Note: The packager does not remove objects from the system during the import process. Therefore, an item that should be removed in `replace' mode, is moved to the Removed folder/portfolio in the root folder.