At a glance

All subgroups in a division must have the same number of lessons.

What causes this error

All subgroups within the same division must have an equal number of lessons. When their lesson counts differ, the scheduler cannot guarantee that all students have the same number of occupied time slots during division periods.

How to fix it

Go to the Lessons section and make sure all subgroups in the division have the same number of lessons. Add or remove lessons from the mismatched subgroups until the counts are equal.

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