Company code &/BusArea & are not assigned to CO area &

What causes this issue?

You created data in company code &V1& and business area &V2& and
simutaneously entered controlling area &V3&, or it was determined
automatically and transferred to cost accounting. In your organization,
business area &V2& in company code &V1& is assigned to controlling area
&V4&, not &V3&.

System Response

The SAP System recognizes this incorrect assignment and rejects it.

How to fix this error?

If you entered controlling area &V3& yourself, simply retype your
entry.
If this is not the case, there is an error in the program. Note the
entries which lead to this error message and inform SAP.

Error message extract from SAP system. Copyright SAP SE.