Yes, your response should include it. It's described in this guide: https://www.bryntum.com/docs/scheduler/#guides/data/crud_manager.md#sync-response-structure
Also you can refer to the online demo to see what it returns.
- Снимок экрана 2020-10-20 в 15.47.43.png (596.22 KiB) Viewed 350 times
Runnable testcase is a must to be able to help you with the issue. Thanks!