Do not assign any objects in cost accounting to account &

What causes this issue?

Account &V1& is a balance sheet account.

System Response

In this case auxiliary account assignments to objects in cost accounting
(for example, cost center, order, or project) are updated in the
document but not in cost accounting.
This message is sent as an error in the standard system. You can make
the message a warning or deactivate it entirely in Customizing. Use the
Implementation Guide under "Controlling: General" and choose
<DS:SIMG.SIMG_CFMENUORK3OBA5>Change message control</>. Enter area KI
and message number 281.

Error message extract from SAP system. Copyright SAP SE.