&1 "&2" selected as reference appraisal

What causes this issue?

If you want to compare appraisals, you must specify a reference
appraisal. This reference appraisal is the appraisal against which the
other appraisal is compared. When the comparison results are displayed,
the rating from the reference appraisal appears in the first line for
each appraisal element.

System Response

If you do not select a reference appraisal, the system automatically
selects the top entry of the entries marked in the list, and uses this
as the reference appraisal.

How to fix this error?

In your editing options, you can specify that the average of the
appraisals you want to compare should be used as the reference. In this
case, the average rating for an appraisal element is displayed in the
first line of the element in question.

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.