Hi, friend.
The EOS of the MA5600T R13 has exceeded one year. Therefore, we cannot verify the downgrade risks of the MA5600T R13.
For more information, please click: https://support.huawei.com/enterprise/en/bulletins-product/ENEWS2000003574
In addition, downgrading the device version may cause unpredictable problems, such as incompatibility with new hardware, spare parts, or NMS.
It is recommended that all devices be upgraded to the new recommended stable version within the support life.
Thanks.