Invalid combination of characteristics in filter &1

What causes this issue?

The combination of selection characteristics is not meaningful.
Valid combinations are stored in system table KLFILLCHECK, and are used
for checking the entries when data is being saved.

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?

Define a valid combination.

Procedure for System Administrators

Error message extract from SAP system. Copyright SAP SE.