MRP creates unneeded planned orders

Hi,

for an article we have fixed planned orders.

Although the quantities of these orders covers the total demand, the MRP still creates additonal planned orders whenever a certain demand can not be fullfilled at the required date.

We do not want this, the stock in MD04 should go negative since planned orders - that are for the moment later planned then the demand is - covers everything.

How can this be achieved please?

Many thanks in advance!!!

danny