Proxy object R3TR &1 &2 is missed in the transport request.

What causes this issue?

The transport request with Proxy objects is created not by using SPROXY
,or some internal error occurred during creation of a transport request

System Response

The Proxy object is missed in the transport request, therefore the
release of the transport request is not possible.

How to fix this error?

The system issues an error message and will not allow you to continue with this transaction until the error is resolved.

The Proxy object for each logical transport object must exist in the
transport request.
<ZU>Hint! If you are in a correction system, it may be necessary to
create additional task in your request, before you insert the missed
objects by using the report or manually. </>
Execute the report ' SPROX_LOG_TRANSP_OBJ_INSERT'.

Procedure for System Administrators

Error message extract from SAP system. Copyright SAP SE.