Leave Request Workflow

Hi,

We have two level approval process for leave request.

We have copied standard leave request workflow 12300111 and added one more approval level to the copy.

Custom workflow is working fine except for scenario where leave request is approved by approver 1 and employee edits leave request. In this case modified request should again go to approver 1, but in our case it remains with approver 2.

How can I modify the workflow that if employee modifies the request, which is already approved by approver 1, it should go back again to first level approver?

Thanks,

Apurva