=== modified file 'purchase/wizard/wizard_group.py'
--- purchase/wizard/wizard_group.py	2010-06-02 14:00:26 +0000
+++ purchase/wizard/wizard_group.py	2010-09-01 13:47:35 +0000
@@ -138,6 +138,11 @@
         neworder_id = order_obj.create(cr, uid, order_data)
         allorders.append(neworder_id)
 
+        #make procurements pointing to the old order point ot the new order
+        proc_obj = pooler.get_pool(cr.dbname).get('mrp.procurement')
+        proc_ids = proc_obj.search(cr, uid, [('purchase_id', 'in', old_ids)])
+        proc_obj.write(cr, uid, proc_ids, {'purchase_id': neworder_id})
+
         # make triggers pointing to the old orders point to the new order
         for old_id in old_ids:
             wf_service.trg_redirect(uid, 'purchase.order', old_id, neworder_id, cr)