At a glance

A lesson references a building that no longer exists.

What causes this error

We've found that a lesson references a building that is missing from your list. This usually occurs if a building was deleted or renamed after the lesson was created. Since rooms are organized by building, we need a valid reference to schedule the lessons correctly.

How to fix it

1. Restore the building — Go to the Buildings section and re-add the missing building.
2. Update the lesson — Alternatively, go to the Lessons section and update or clear the building reference for the affected lesson.

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