How to avoid change of requirement date of reservation after material is issued.

Hi Experts,

I created reservation for a component against one operation inmaintenance order through IW32 and issued the material through MB1A. Then I changed the start date of the operation and created reservation for the second component against the same operation. The requirement date for reservation of the second component is as per the new start date of the operation, but the requirement date of the first component which was already issued have also been changed. I want to stop this, so that in future I can see the exact requirement date of reservations created for the components. Please suggest the method to achieve this.

Thanks and Regards

Mahesh.