Issue when reassigning notification in Expenses Workflow

Hi,

An employee A created an expense report on 10-Aug-2017.

Employee B is the approver.

Hence a notification is sent to Employee B.

But the approver role has expired on 21-Jul-2017 (Prior to 10-Aug-2017).

Hence notification fails as the approver does not exist.

I tried to reassign the approver by going to status monitor and then into "Activity History"

But I am unable to assign to another approver. The workflow ends in Error.

Is there any other option/method to reassign it to another approver?

Expense Workflow Name - Expenses

Workflow Internal Name - APEXP

Thanks,

Krishna

Thanks,

Krishna