diff --git a/app_mrp_workcenter_zchart/models/mrp_workcenter.py b/app_mrp_workcenter_zchart/models/mrp_workcenter.py
index 1ef8e1e8..68087c5f 100644
--- a/app_mrp_workcenter_zchart/models/mrp_workcenter.py
+++ b/app_mrp_workcenter_zchart/models/mrp_workcenter.py
@@ -14,14 +14,15 @@ class MrpWorkCenter(models.Model):
     _parent_name = "parent_id"
     _parent_store = True
     _parent_order = 'code'
+    _order = 'parent_path, code'
 
-    parent_id = fields.Many2one('mrp.workcenter', 'Parent WC', index=True, ondelete='cascade')
+    parent_id = fields.Many2one('mrp.workcenter', 'Parent WC', index=True, ondelete='restrict')
     parent_path = fields.Char(index=True)
     child_ids = fields.One2many('mrp.workcenter', 'parent_id', 'Child WCs')
     child_all_count = fields.Integer(
         'Indirect Surbordinates Count',
         compute='_compute_child_all_count', store=False)
-    level = fields.Integer('Level', compute='_compute_level', inverse=False, default=0, readonly=True, store=True)
+    level = fields.Integer('Level', compute='_compute_level', inverse=False, readonly=True, store=True)
 
     @api.depends('child_ids.child_all_count')
     def _compute_child_all_count(self):
diff --git a/app_stock_superbar/views/stock_picking_type_views.xml b/app_stock_superbar/views/stock_picking_type_views.xml
index e85271b7..c7d9ae8e 100644
--- a/app_stock_superbar/views/stock_picking_type_views.xml
+++ b/app_stock_superbar/views/stock_picking_type_views.xml
@@ -9,6 +9,7 @@
         <field name="arch" type="xml">
             <xpath expr="//search">
                 <searchpanel view_types="tree">
+                    <field name="code"/>
                     <field name="warehouse_id" groups="stock.group_stock_multi_warehouses"/>
                 </searchpanel>
             </xpath>