Account Move Reconcile Forbid Cancel

This module adds a safety rule to accounting entries in Odoo. When a user tries to cancel an invoice or journal entry, or to reset it back to draft, Odoo first checks whether that entry contains any reconciled journal items. If it does, the action is blocked and an error message appears: "You cannot cancel reconciled entries." or "You cannot reset to draft reconciled entries."

The rule applies to the standard Cancel and Reset to Draft buttons found on invoices and journal entries (account.move). It does not add new menus, screens or reports; it only changes the behaviour of these existing buttons.

A technical escape hatch exists: the check can be skipped through a special context flag, which is mainly used by automated tests or specific flows. In normal day-to-day use, accountants and other users will simply be stopped from undoing entries that are already matched with payments.

This helps protect the integrity of the accounting records by making it harder to accidentally cancel or reopen entries that have already been reconciled.