Attribute definition & is empty and will be ignored

What causes this issue?

In Document Finder Customizing, no existing attributes are assigned to
the new document attribute.

System Response

The attribute is ignored when the selection screen is created.

How to fix this error?

Either delete or deactivate the attribute in Document Finder
Customizing.

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.