This error means that a child is either showing on two different rolls for the same day or multiple times on one roll for the same day.
Firstly, check the statement to see if the child is showing multiple times on different rolls.
If so, go to the Rolls Screen and remove the child from the incorrect roll.
If the child is not showing on multiple rolls, go to the correct roll on the Rolls Screen and view the attendances day by day.
If you see the child multiple times, remove the entry that does not show any YTD absences for CCB.