The system is flagging this error due to the employee most likely trying to book off more holiday than what they are contracted to work.
So, for instance, if the employee only works 3 days a week, and is trying to book off 4 days leave, the system will then throw this error message stating that the working days is greater than the contracted days in the period.
📌Note: The employee would need to have multiple records on the system for this to work effectively. So, one of those absence records would show 3 working days, and the 2nd absence record would show 1 working day, totalling 4 days leave.