Oracle_Old expense reports and Merchant name still shows in records

We have a scenario where an employee left organization 2 years ago and rejoined this year. The old employee id and User are reactivated in Oracle. When he is trying to submit a new expense report, he is still seeing old expense reports which were already paid and audited. He is also seeing old Merchant name i.e. credit card number in this case which he submitted 2 years ago (no longer holds the same credit card). Looks like old Merchant name and old expense reports are defaulted since the old employee id was activated. How to resolve this issue ?