PO raised by OSP is not getting updated for Need by Date

Hello All,

Please help me to fix below issue -

PO raised by OSP is not getting updated for Need by Date: I need to update need by date based on changes done in completion date of work order, I have done setup of Job Change Controls as well. Propagate Job Change to Purchasing as Automatic, Need by Tolerance Days Early: 0 and Days Late as 0

Still when I am running Discrete Update OSP Need-by Dates it is not updating Need by Dates on Purchase Order

Regards

Aditya