You cannot put system object &1 in a BC Set

What causes this issue?

The table &V1& is a system object. These are tables which either belong
to the ABAP Dictionary or are internal SAP system tables. You cannot
transport them or use them in BC Sets.
Examples of system objects/tables: T000, T100, TDEVC, TADIR, TFDIR,
CVERS, OBJH, OBJS, ....
<ZK>Delivery class (shown in transaction SE11): </>The delivery class is
not relevant for system objects, i.e. even if this table has a
customizing delivery class, you can still not put it in BC Sets.

System Response

You cannot put system objects in BC Sets.

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.

Procedure for System Administrators

For further information about the transport attributes of system objects
, see <DS:NA.TR731>Message TR731</>.

Error message extract from SAP system. Copyright SAP SE.