Inconsistency between a document field and the prof. segment number

What causes this issue?

A line item was assigned to a profitability segment (number &V1&) which
has the value &V4& for characteristic &V2&. The original document (FI
document, sales order, internal order, etc.), however, contains &V3& in
this field. It is therefore inconsistent with the profitability segment
found.

System Response

The characteristics in Profitability Analysis (CO-PA) must have the
same characteristic values as the original document. For example, you
cannot assign a sales order to a different customer or product than the
one contained in the original sales order. If you wish to fill the
characteristics with different contents, you must change the original
fields.

How to fix this error?

Enter the correct characteristic values on the CO-PA assignment screen.
The system will automatically assign a corresponding profitability
segment number. If it is not possible to enter values in some of these
fields, delete the entire assignment to a profitability segment number
and then enter it again.
As a rule, you should first enter the fields in the original sender
document and then make the assignment to a profitability segment.

Error message extract from SAP system. Copyright SAP SE.