CO account assignment &1 &2 is in the balance

What causes this issue?

In Customizing of the controlling integration for the
<DS:GLOS.31CE1B848009D511BCBC0800060D9C68>business scenario</> &v3&, you
have set up that &v1& &v2& uses the
<DS:GLOS.9348AF799601D511BCBB0800060D9C68>controlling type</>
'Controlling for account assignment object.

System Response

It is intended that costs and revenues for &v1& &v2& be booked in
R/3-CO. The CO account assignment to do this is specified by the
external system for the business scenario &v3&. This has not happened
yet.

How to fix this error?

If the controlling type 'Controlling for acount assignment object' is
correct, then contact the person responsible for &v1& &v2& in the
external system for the business scenario &v3& and enquire why the
account assignment has not been entered yet.
If the controlling type 'Controlling for acount assignment object' is
not correct, then check the settings for business scenario &v3& in
Customizing of controlling integration. If another controlling type is
to be used from now on for similar objects, then set the controlling
type you want. You cannot change the controlling type of an object
retroactively. In this case, during determination of the controlling
type, the date and time settings for &v4& were used (date and time are
displayed in time zone <DS:TX.SZTZ_UTC>UTC</>).

Procedure for System Administrators

The system issues an error message and will not allow you to continue with this transaction until the error is resolved.

Error message extract from SAP system. Copyright SAP SE.