Hi, :) Can someone confirm that bug 20461 doesn't prevent to create subscriptions that will create items with invalid itypes? https://bugs.koha-community.org/bugzilla3/show_bug.cgi?id=20461#c15 If so, then we could ignore previousitemtype when it's invalid. To not corrupt items when has been forgotten or to handle the existing data which didn't had a previousitemtype due to bug 20461. For some reason I'm very confused by this issue and have a very varying understanding of it. That's why it seems wiser to ask for a confirmation before preparing a follow up :) Cheers, -- Victor Grousset, dev support/maintenance BibLibre, Services en logiciels libres pour les bibliothèques BibLibre, Libre/Open Source software and services for libraries