../../source/tools.rst:3096 (Manual for 20.11) Ignore incoming record: choose this if you don't want to import records that are not alreay in your catalogue (for example, if you're only replacing existing records and don't want to add anything)
Change required in all versions of the manual from 20.11 to master.
Manual updated (https://gitlab.com/koha-community/koha-manual/-/merge_requests/555)