Invalid semantic object &1

What causes this issue?

The target mapping contains a reference to the semantic object &V1&
which is not defined in the system.
SAP delivered semantic objects are defined in the table "/UI2/SEMOBJ".
They are maintained via the maintenance view "/UI2/V_SEMOBJ" in the
original system of the software component "SAP_UI". The maintenance of
the table content is performed centrally and not by individual
developers.
Customer defined semantic objects are defined in the table
"/UI2/SEMOBJC". They are maintained via the maintenance view
"/UI2/V_SEMOBJC" in the customer system.

System Response

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

How to fix this error?

If the target mapping is SAP delivered content, follow the standard
process to request the semantic objects.
If the target mapping is customer defined content, maintain the semantic
object in the customer system.

Procedure for System Administrators

Error message extract from SAP system. Copyright SAP SE.