Table cells must not have multiple values

What causes this issue?

Only one value per cell is allowed for the model maintenance in the
variant configuration, because multiple values in a cell reduce the
scalability of table evaluations and cannot be displayed with standard
spreadsheet programs.

System Response

You entered multiple values in a table cell.

How to fix this error?

If you nevertheless want to enter multiple values in a cell, choose
<ZK>Logistics </><NP><ZK>-></></><ZK> Central Functions </><NP><ZK>-></>
</><ZK> Variant Configuration </><NP><ZK>-></></><ZK> Tools </><NP>
<ZK>-></></><ZK> Table Contents </><NP><ZK>-></></><ZK> Maintain</>.

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.