Existing delivery schedules in ME32L and new MRP

Hello,

We are using purchase schedule agreements, now we are planning to run the MRP.

So that based on the customer demands, system can create the new schedules for purchased parts in the schedule agreement after MRP run.

But we have existing delivery schedules in the scheduling agreements for the purchase parts. I believe after the MRP it would mess it up.

Is there anyway i can delete the existing delivery schedules and after the MRP, schedule aggreement should have only new delievry schedules.

Kind regards,

JPS