[Koha] upgrading koha from v1.2.3 to the latest version v2.2

We have a very old koha library v1.2.3 with mysql v.3.xx. Now my boss wanna upgrade this old koha library to the latest version. Anyone has any idea how to upgrade koha and migrate data to the new database? As I think there might be lots of changes in koha and database. Do I have to upgrade from 1.2.3 to 1.3, to 1.9, to 2.0 and then to 2.2 one by one? Or Is there any better way to do that? Cheers. -- View this message in context: http://www.nabble.com/upgrading-koha-from-v1.2.3-to-the-latest-version-v2.2-... Sent from the Koha - Discuss mailing list archive at Nabble.com.