=== modified file 'sale/sale.py'
--- sale/sale.py	2012-10-09 12:16:14 +0000
+++ sale/sale.py	2012-11-05 09:16:52 +0000
@@ -821,6 +821,10 @@
         for line in order_lines:
             if line.state == 'done':
                 continue
+            # If the Sale Order Line already has Stock Moves, skip it if no moves were cancelled
+            if line.move_ids and all(
+                    [m.state != 'cancel' for m in line.move_ids]):
+                continue
 
             date_planned = self._get_date_planned(cr, uid, order, line, order.date_order, context=context)