Agree with your point that the inventory should not be touched since the stock valuation in BC is already correct and reconciled.
However, posting the adjustment directly to a normal P&L account may impact the current year profitability, which can create issues when PY financials are already audited.
A safer approach is usually to clear the Suspense Account against a Balance Sheet equity-type account such as:
Opening Balance Adjustment
Prior Period Adjustment (Balance Sheet type)
Migration Difference Reserve
This keeps:
Inventory unchanged
Current year operational profit unaffected
Audit trail clean for migration-related differences
And yes, absolutely agree that:
Entry should be G/L only
No Item Journal / Inventory Revaluation
Proper narration & documentation should be maintained for audit reference
Final account selection should be confirmed by the Auditor/CA based on local accounting standards.