At a glance

An unavailability rule references a teacher or group that no longer exists.

What causes this error

An unavailability rule references a Teacher, Class, or Room that no longer exists. This usually happens when a resource is deleted while it still had blocked time slots assigned to it.

How to fix it

Restore the resource — Re-add the Teacher, Class, or Room with the exact same name as shown in the error. This will reconnect the existing unavailability rule to the restored resource.

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