Order & is not assigned to business area &

What causes this issue?

Order &V1& is assigned to business area &V3&. You assigned an account
to both order &V1& and business area &V2& or the SAP System determined
this business area from other data.

How to fix this error?

Assign business area &V2& to order &V1&.
Alternately, cancel the entry of business area &V2&.
Or, check the other entries from which the SAP System could have
determined business area &V2&.

Error message extract from SAP system. Copyright SAP SE.