EDD Plan With Detail scheduling Cancelling Existing Purchase orders and suggesting a new Planned ord

Hi All,

We have setup a EDD plan with Detail scheduling , and pegging option as FIFO.

The Plan is suggesting us to cancel the existing Purchase orders rather than rescheduling them and suggesting for a new planned orders , which in turn is creating excess of inventory.

I am attaching the  supply demand of the item.

Can anyone suggest the reason for this behavior.