https://bugs.koha-community.org/bugzilla3/show_bug.cgi?id=26604 --- Comment #13 from Jonathan Druart <jonathan.druart@bugs.koha-community.org> --- Ok, I managed to recreate it. This is very tricky. Test plan: 1. Create a new subscription * When there is an irregular issue: Skip issue number * Select a frequency (not irregular) * Test prediction pattern and mark some "not published" (to fill the subscription.irregular DB field 2. Receive a first serial (mark it arrived, an "expected" one is created) 3. Claim the expected one => You have 1 arrived and 1 claimed. It's the only way to not have an expected one and hit the else block in serials/serials-collection.pl 4. Generate next => boom -- You are receiving this mail because: You are watching all bug changes.