What causes this issue?

Table &V1& is not client-dependent.

System Response

Conversion of this table has influence on all clients in the system.

How to fix this error?

Check if table &V1& should be converted. In case, this table should not
be converted, exclude it in activity <DS:SIMG.CNV_00001_D_MAINT>
Settings for new conversion-relevant tables</>.

Procedure for System Administrators

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

Error message extract from SAP system. Copyright SAP SE.