Breakdown by &1 supplied with fixed value &2 from breakdown category

What causes this issue?

The current data record contains no characteristic value for
characteristic &V1&. This characteristic is assigned to item &V3& as a
required breakdown, whose value is entered by a fixed value in the
breakdown category.

System Response

The system uses the fixed value &V2& as the characteristic value for
breakdown characteristic &V1&.

How to fix this error?

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.