diff --git a/addons/stock/models/stock_move_line.py b/addons/stock/models/stock_move_line.py
index a6167161b6c..d87890838f3 100644
--- a/addons/stock/models/stock_move_line.py
+++ b/addons/stock/models/stock_move_line.py
@@ -385,7 +385,7 @@ class StockMoveLine(models.Model):
         updates = {}
         for key, model in triggers:
             if key in vals:
-                updates[key] = self.env[model].browse(vals[key])
+                updates[key] = vals[key] if isinstance(vals[key], models.BaseModel) else self.env[model].browse(vals[key])
 
         if 'result_package_id' in updates:
             for ml in self.filtered(lambda ml: ml.package_level_id):
diff --git a/addons/stock/tests/test_move.py b/addons/stock/tests/test_move.py
index e115757f1b1..321d16b8007 100644
--- a/addons/stock/tests/test_move.py
+++ b/addons/stock/tests/test_move.py
@@ -4161,7 +4161,7 @@ class StockMove(TransactionCase):
         self.assertEqual(self.env['stock.quant']._get_available_quantity(self.product_lot, self.stock_location), 1.0)
         self.assertEqual(self.env['stock.quant']._get_available_quantity(self.product_lot, self.stock_location, lot_id=lot1, package_id=package1), 1.0)
 
-        move1.move_line_ids.write({'lot_id': lot2.id})
+        move1.move_line_ids.write({'lot_id': lot2})
 
         self.assertEqual(self.env['stock.quant']._get_available_quantity(self.product_lot, self.stock_location), 1.0)
         self.assertEqual(self.env['stock.quant']._get_available_quantity(self.product_lot, self.stock_location, lot_id=lot1), 0.0)