Can I use an employee identification number more than once?

No, to ensure data accuracy and prevent errors, our system will restrict the input of an identification number to a single active employee. 

For example, when adding a new employee, reinstating an old employee, or updating the identification number of an existing active employee, the system will block the action if there is another active employee with the same identification number. This precaution is in place to avoid the duplication of employees.