Category unavialble in Iprocurment

Hi,
We recently changed category of item, w are able to query category for particular item.

But when raising purchase requisition in Iprocurement we are getting old item category instead of  new item category assigned to that item.

We are using default main store and default shopping category.

How can the new item category be replaced with old category in Iprocurement.

Please let me know what to do in this case.

Thanks
Vinay