Every transaction books into a month on the COSTING calendar. The month this transaction's cost date falls into is closed, the door is locked. Note it's the COST date that matters, which for backdated transactions is not always the transaction date you see in inventory.
The transaction's cost date lands in a closed costing period.
My Oracle Support document IDs for readers with access: 1304094.1 (cost date vs transaction date FAQ). We do not reproduce their content.
Checked Cost Management troubleshooting for Oracle Fusion, rewritten in plain words from publicly known practice and reviewed by a working consultant. Checked against the current release, Jul 2026. Navigation and behavior vary by configuration; verify in your own instance and test before acting.