Expense Policy Issue after changing Grade change

We are facing issue policy

Lets say Grade D1 = 10000 USD Amount Limit from 01-Jan-23

Employee enter expense report of 5000 USD and company paid to employee

Now Company Grade of employee L11 in Feb-23 and 10000 USD limit for this grade

Now employee is able to submit 10000 USD expense report but we want to restrict employee as employee is already claimed 5000 USD and only 5000 USD is pending to claim

How can we achieve this