If a customer has paid an advance towards a future appointment.
You will see that this can be in your daily revenue as 'No department'
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The reason for this is because at the moment of 'purchase' when the advance is put into the system, we do not know for what service or product the advance will be used in the future.
It is not possible to change past data for department in the daily revenue once the advance has been used as this is not allowed from a accounting point of view
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