Opening GL balances where the intercompany segment is to reflect entities not yet on Oracle

Summary:

When migrating opening balances where the intercompany segment is to reflect entities not yet on Oracle, populating the IC segment will mean that the Intercompany reconciliation report will have unreconciled differences if we use the 'real' intercompany natural account. And have a balance forever if we use another "migrated IC" until/unless we manually move it out as part of each entity going-live. What should we do instead if we want to keep the seeded IC reconciliation functionality , or should we create a custom Intercompany reconciliation report (which would be a shame to lose that standard functionality),