diff --git a/addons/mrp/models/mrp_bom.py b/addons/mrp/models/mrp_bom.py
index fcab8f82015..8032cad2b60 100644
--- a/addons/mrp/models/mrp_bom.py
+++ b/addons/mrp/models/mrp_bom.py
@@ -68,17 +68,6 @@ class MrpBom(models.Model):
             for line in self.bom_line_ids:
                 line.attribute_value_ids = False
 
-    @api.multi
-    def write(self, values):
-        mos = self.env['mrp.production'].search_count([
-            ('bom_id', 'in', self.ids),
-            ('state', 'not in', ['done', 'cancel'])
-        ])
-        if mos and any(k not in ['code', 'sequence', 'pick_type_id', 'ready_to_produce'] for k in values.keys()):
-            raise ValidationError(_('This BoM is used in some Manufacturing Orders that are still open. You should rather archive this BoM and create a new one.'))
-        return super(MrpBom, self).write(values)
-
-
     @api.constrains('product_id', 'product_tmpl_id', 'bom_line_ids')
     def _check_product_recursion(self):
         for bom in self:
diff --git a/addons/mrp/tests/test_bom.py b/addons/mrp/tests/test_bom.py
index 354babff84a..44fd56b6431 100644
--- a/addons/mrp/tests/test_bom.py
+++ b/addons/mrp/tests/test_bom.py
@@ -228,19 +228,3 @@ class TestBoM(TestMrpCommon):
                 })
             # Check consumed materials in production order.
             self.assertEqual(mrp_order.move_raw_ids.mapped('product_id').ids, consu_product_ids)
-
-    def test_update_bom(self):
-        """Update a BoM used in open production should raise an error"""
-        mo = self.env['mrp.production'].create({
-            'name': 'MO 1',
-            'product_id': self.product_1.id,
-            'product_uom_id': self.product_1.uom_id.id,
-            'product_qty': 2,
-            'bom_id': self.bom_1.id,
-        })
-        mo.button_plan()
-        # update an authorized field
-        self.bom_1.write({'code': 'Hello'})
-        # update a not authorized field
-        with self.assertRaises(exceptions.ValidationError):
-            self.bom_1.write({'product_id': self.product_2.id})
diff --git a/addons/mrp/tests/test_workorder_operation.py b/addons/mrp/tests/test_workorder_operation.py
index 4066a8d33ab..49df9007835 100644
--- a/addons/mrp/tests/test_workorder_operation.py
+++ b/addons/mrp/tests/test_workorder_operation.py
@@ -124,7 +124,7 @@ class TestWorkOrderProcess(common.TransactionCase):
         self.env['stock.move'].search([('product_id', '=', product_bolt.id)])._do_unreserve()
         product_bolt.type = 'product'
 
-        bom = self.env['mrp.bom'].browse(self.ref("mrp.mrp_bom_desk")).copy()
+        bom = self.env['mrp.bom'].browse(self.ref("mrp.mrp_bom_desk"))
         bom.routing_id = self.ref('mrp.mrp_routing_1')
 
         bom.bom_line_ids.filtered(lambda p: p.product_id == product_table_sheet).operation_id = bom.routing_id.operation_ids[0]