If a librarian copies a serial subscription and changes dates the Flatpickr allows to put end date to the past. Flatpickr prevents the action only if the start date is first added. In this case the old input value should be passed to the Flatpickr so the selection is not allowed. I think this happens everywhere where we are using Flatpickr.
Created attachment 183724 [details] [review] Bug 36136: Add validation to subscription end date Fixed an issue where editing an existing subscription as a duplicate would result in being able to select the end date before the start date. To test: 1)In Koha go to Serials 2)Search for existing subscriptions 3)Select a subscription 4)Select Edit, Edit as new(duplicate) 5)On the second page set the end date before the start date 6)When pressing save subscription a warning pops up, preventing you from selecting the end date before the start date. Sponsored-by: Koha-Suomi Oy