Scheduling Agreement Item &1 &2: Invalid Type for Fiscal Year Change

What causes this issue?

This error message is issued if an indicator that is not supported is
selected for the type of fiscal year change in customer function 004 in
enhancement V45L0001. There are two possible causes:
'C' was selected for the type of fiscal year change (E_RESET_CDQ) and
the delivery schedule item in question is planned in APO.
This type of fiscal year change is only supported for delivery schedule
items that are scheduled in the system.
'D' was selected as the type of fiscal year change (E_RESET_CDQ) and the
delivery schelude item in question is an item that is planned in the
system.
This type of fiscal year change is only supported for delivery schedule
items that are planned in APO.
For the delivery schedule items &V1& &V2& the type of fiscal year change
is determined with &V3&. &V4& was determined as the system to be used
for scheduling.

System Response

The system does not allow processing of the delivery schedule item to
continue.

How to fix this error?

To correct the error, you have the following options:
Either you change the customer function 004 in enhancement V45L0001 so
that this returns a valid type for the fiscal year change.
Or you add the delivery schedule item to an active integration model or
remove it from the integration model that contains the delivery schedule
item, so that the system in which the delivery schedule item is planned
corresponds to the implementation of the customer function.
Whether the delivery schedule item must be added to an integration model
or removed from an integration model, is independent of the cause of the
problem.

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.