At a glance

A manually placed lesson is pinned to a time that is now blocked or unavailable.

What causes this error

A lesson was pinned to a specific time slot, but that slot is no longer available for this lesson.

The most common scenario is regenerating/evaluating a timetable after the configuration changed. If you modified the school periods, adjusted the class's Starting/Ending timeslot rules, or added unavailable periods after the previous generation, the time where the lesson was pinned may no longer exist or may now be blocked.

Other causes:

• The class's allowed time range was narrowed after the lesson was pinned.
• Unavailable periods were added to the class that now cover the pinned slot.

How to fix it

Case 1 — School periods changed since the timetable was generated:

There are two directions you can take:

• Adapt the timetable: Open the timetable editor, find the lesson, and unpin it or move it to a currently valid slot.
• Adapt the school configuration: Go to School Config → Periods and restore the period that was removed, so the pinned slot becomes valid again.

Case 2 — School periods have not changed:

The pinned slot exists but is blocked by the class configuration. Check the following in Classes for the affected class:

• Unavailable periods — remove any unavailable period restriction that covers the pinned slot.
• Starting/Ending hour — widen the active time range if it no longer includes the pinned slot.

Back