I am using Korganizer 5.7.3 (within Kontact 5.7.3) since quite a few years. I’m using a CalDAV server to synchronize calendar data. Everything works fine with one exception: When I delete series event on another device, Korganizer correctly deletes these events when it synchronizes with the CalDAV server, but it keeps alerting me of these events (while other devices don’t). How can I deleted such reminders from Korganizer’s database?