Run the following query to confirm:
select FIN.OBJECT_ID INVID, INV.name, INV.CODE, COUNT(FIN.OBJECT_ID) INVIDCOUNT
from FIN_PLANS FIN, INV_INVESTMENTS INV
where FIN.PLAN_TYPE_CODE = 'FORECAST'
and fin.is_plan_of_record = 1
and FIN.OBJECT_ID = INV.id
group by fin.object_id, inv.name, inv.code
having count(fin.object_id) > 1
If any records are returned, then those investments have more than one cost plan of record.