OT928G loopback cannot be configured due to U2000 internal problem

Issue Description

It is required to configure loopback on OT928G through U2000 management system but when it is done system
pop ups an alarm informing that operation failed.
MA5680T MA5600V800R008C01
U2000 V100R002C01SPC004

Alarm Information

Set a Local Loopback operation failed
Failure cause: The version does not match

Handling Process

Process to configure loopback through U2000 was verified and tested to confirm it is correct and it was but the failure was gotten
Versions compatibility was verified and it was confirmed U2000 supported Huawei MA5600T base version
Process was recurred to collect some info and logs that were sent to R&D who finally confirmed it was U2000 problem so, they provided a temporal solution replacing file GPON_operdesc.xml  on following path.

U2000/server/nemgr/nemgr_access/dcp/mib/gpon/GPON_operdesc.xml
However, this problem has been already solved on patch SPC501 for U2000

Root Cause         

Procedure to configure loopback is not correct
U2000 and OLT versions are not compatible
Software system problem

Suggestions

Null