Mass update Billing Rate Schedule

Hi Team,

When we create a Project from Project Template (having WBS defined) it automatically takes the default BIlling Rate Schedule assigned to the Project Template. As the Project Template was having a WBS so by default at Task level the BIlling Rate Schedule get defaulted from the template.

We create multiple Projects from the same template but the BIlling Rate Schedule will be different for different Customers. It will be really difficult to change the BIlling Rate Schedule at each task level as they are holding the default rate from the Project Template.

How can this situation be handled. Any suggestion on this please.