SUMMARY I changed the calendar/agenda of an existing task with subtasks (using the top selectbox in the task editing window). The main task seemed to change calendar/agenda (color change), but it subtasks didn't (no color change, still visualized as subtasks). Afterwards, it turned out that it had created a mess, as the subtasks became ‘dirty’ akonadi pimitems (messing with any further synchronization) and the main item apparently reverted to the original calendar/agenda. STEPS TO REPRODUCE 1. Change calendar/agenda of an existing task with subtasks OBSERVED RESULT Subtasks become dirty; whole operation fails in the end EXPECTED RESULT Whole subtree rooted in changed task is moved to calendar/agenda the main task was changed to SOFTWARE/OS VERSIONS KDE Plasma Version: 5.24.6 KDE Frameworks Version: 5.90.0 Qt Version: 5.15.5