Shared fields in QM and PM notifications

I would like to set the Complaint Field (VIQMEL-RKMNG) in a Q1 and Q2 Quality Notification as a required input field.  When I do so,, the Complaint field in a PM notification also becomes required.  I believe the field is shared.

I am looking for a way to only have the Complaint field in a Q2 and Q3 notification set as required field and NOT have it required in PM Notifications.

Is there possibly a User Exit for this or is this can this be accomplished in Customizing?

Thanks,

Greg