A Business Configuration Set key is incomplete

What causes this issue?

The Business Configuration Set contains a data record with an
incompletely specified key.

System Response

This data record has not been put in the maintenance object.

How to fix this error?

Read the data record manually from the Business Configuration Set and
add the missing key values.

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.