Cost center &/& belongs to business area & instead of &

What causes this issue?

Cost center &V2& in controlling area &V1& is assigned to business area
&V3&. You have also assigned accounts from this cost center to business
area &V4&.

System Response

Only one business area must be assigned for each posting row.

How to fix this error?

Do one of the following.
Assign accounts to business area &V3&.
Enter a cost center assigned to business area &V4&.
Change the assignment of cost center &V2& to business area &V3&. In
this case you should note the document and reprocess it after you have
changed the assignment.

Error message extract from SAP system. Copyright SAP SE.