diff --git a/addons/stock/models/stock_quant.py b/addons/stock/models/stock_quant.py
index 67a51966e2f..f1c696426f8 100644
--- a/addons/stock/models/stock_quant.py
+++ b/addons/stock/models/stock_quant.py
@@ -335,6 +335,15 @@ class StockQuant(models.Model):
             self = self.sudo()
         return super(StockQuant, self).write(vals)
 
+    @api.ondelete(at_uninstall=False)
+    def _unlink_except_wrong_permission(self):
+        if not self.env.is_superuser():
+            if not self.user_has_groups('stock.group_stock_manager'):
+                raise UserError(_("Quants are auto-deleted when appropriate. If you must manually delete them, please ask a stock manager to do it."))
+            self = self.with_context(inventory_mode=True)
+            self.inventory_quantity = 0
+            self._apply_inventory()
+
     def action_view_stock_moves(self):
         self.ensure_one()
         action = self.env["ir.actions.actions"]._for_xml_id("stock.stock_move_line_action")
diff --git a/addons/stock/tests/test_quant.py b/addons/stock/tests/test_quant.py
index c70f746a1c6..71cebe479b9 100644
--- a/addons/stock/tests/test_quant.py
+++ b/addons/stock/tests/test_quant.py
@@ -509,7 +509,7 @@ class StockQuant(TransactionCase):
             })
         with self.assertRaises(AccessError):
             quant.with_user(self.demo_user).write({'quantity': 2.0})
-        with self.assertRaises(AccessError):
+        with self.assertRaises(UserError):
             quant.with_user(self.demo_user).unlink()
 
         self.env = self.env(user=self.stock_user)