diff --git a/addons/mrp/mrp.py b/addons/mrp/mrp.py
index a57b76bf2ce..03b04478524 100644
--- a/addons/mrp/mrp.py
+++ b/addons/mrp/mrp.py
@@ -342,7 +342,7 @@ class mrp_bom(osv.osv):
         if context is None:
             context = {}
         bom_data = self.read(cr, uid, id, [], context=context)
-        default.update({'name': bom_data['name'] + ' ' + _('Copy')})
+        default.update({'name': bom_data['name'] + ' ' + _('Copy'),'bom_id':False})
         return super(mrp_bom, self).copy_data(cr, uid, id, default, context=context)
 
 mrp_bom()
@@ -664,7 +664,7 @@ class mrp_production(osv.osv):
         """
         stock_mov_obj = self.pool.get('stock.move')
         production = self.browse(cr, uid, production_id, context=context)
-        
+
         final_product_todo = []
 
         produced_qty = 0