Hi Sun Riser,
As was mentioned by Caetano the problem is the Requirement Type.
In MD04 you can see that the system is planning this sales order as Make to Order (note that you have a Block for the sales order in MD04). Change the Requirement Type in your Sales Order (VA02 --> Procurement tab) and put KSV.
You will see that the special session (blue lines) in MD04 for the sales order you will disappear, meaning that this will be a Make to Stock planning scenario.
Now, in order to consume the PIR, as was also mentioned by another expert, you need to enter a backward and / or forward period consumption, following by the right consumption mode.
Kind Regards,
Mariano