diff --git a/addons/mrp/models/mrp_production.py b/addons/mrp/models/mrp_production.py
index 8e114cf73f9..bb4c303ed30 100644
--- a/addons/mrp/models/mrp_production.py
+++ b/addons/mrp/models/mrp_production.py
@@ -537,6 +537,7 @@ class MrpProduction(models.Model):
             if production.state != 'draft':
                 continue
             workorders_list = [Command.link(wo.id) for wo in production.workorder_ids.filtered(lambda wo: not wo.operation_id)]
+            workorders_list += [Command.delete(wo.id) for wo in production.workorder_ids.filtered(lambda wo: wo.operation_id and wo.operation_id.bom_id != production.bom_id)]
             if not production.bom_id and not production._origin.product_id:
                 production.workorder_ids = workorders_list
             if production.product_id != production._origin.product_id: