Fix a wrong hard lock date in Odoo without undoing it.

This guide is for anyone who set a hard lock date in Odoo on the wrong date, for example by locking a whole fiscal year before the auditors had finished with it. The short answer: Odoo does not let anyone remove a hard lock date or move it to an earlier date, from any screen, import or automated action. It can only be moved later. What you can do is record the correction in the first open period, or, if entries really must carry a date inside the locked period, go back to a copy of the database taken before the lock was saved.

It is written for accountants, controllers and owners who handle period closing. The behavior was verified in the Odoo 19 source code, and Odoo 20 applies the same rules.

Before you start

• Version and edition: Odoo 19 or Odoo 20. The rule that stops a hard lock from being removed lives in the core accounting module, so it applies whatever your edition. The Lock Dates window used to view and set lock dates belongs to the Accounting app in Enterprise.
• Access rights: the Lock Dates menu only appears for users whose Accounting access is set to Administrator, and only those users can save a change in it.
• Terms used: a lock date is a cut-off date: journal entries dated on or before it can no longer be posted or edited there. The hard lock date is the strict version, meant to prove that a closed period was never altered. The other lock dates, such as Lock Everything, are soft locks. An administrator can lift a soft lock with an exception, which is a permission to work behind the lock for a set time or permanently, recorded with a reason.

What the hard lock blocks and allows

Once a hard lock date is saved, every journal entry dated on or before it is frozen. In practice:

• Posted entries cannot be edited. Changing the date, number, accounts, amounts, taxes, partner or journal of a posted entry in the locked period stops with an error that names the Hard Lock Date.
• Posted entries cannot go back to draft. The Reset to Draft button can still appear on the form, but clicking it on a locked entry produces the same error.
• New documents are pushed forward, not refused. If you post an invoice or bill dated inside the locked period, Odoo keeps the invoice date you typed and sets the Accounting Date to the first open date. Before you post, the form shows a notice saying which date the entry will be recorded on.
• Copies are moved too. Duplicating an entry from the locked period gives the copy a date after the lock.
• No exception is possible. Exceptions can only be granted on the soft lock dates. The hard lock is not among the dates an exception can cover.

The one change that is still allowed is moving the hard lock date later. An Accounting Administrator can do that in the Lock Dates window, as long as the new date is not in the future.

Why it cannot be removed or moved back

Odoo checks the rule in two places. The Lock Dates window refuses to save a hard lock that is blank or earlier than the current one. Behind that window, the company record runs its own check every time anything tries to change the lock, and rejects a blank or earlier date with an error. That second check applies to every user, administrators included, and to anything that writes data through Odoo, such as a scheduled action, a server action or an import.

So clearing the date with a scheduled action does not work: the action reaches the same check and fails. Only an edit made directly in the database, outside Odoo, would get past it. That defeats the purpose of the lock, which exists to show that closed periods were never touched and in some countries is part of meeting legal accounting requirements. A change made that way would also bypass Odoo's own record of who changed the lock and when. Treat it as off the table.

How to correct entries in a locked period

Option 1: record the correction in the open period. This keeps the locked period intact and leaves a visible trail.

1. Open the Accounting app and find the wrong document, for example under Customers > Invoices.
2. For a customer invoice or vendor bill, click Credit Note. For a manual journal entry, click Reverse Entry. A window opens with a Reversal date, which defaults to today.
3. Keep the reversal date in an open period and click Reverse. Odoo creates the reversing document and opens it. A reversed journal entry is posted straight away; a credit note opens in draft, so check it and click Confirm.
4. Enter the corrected invoice, bill or journal entry. If you give it a date inside the locked period, Odoo moves its Accounting Date to the first open date, as described above.

How a prior-year correction should be presented in your statements, for example as an adjustment to opening retained earnings, is an accounting decision to make with your accountant. Odoo only requires that the entry sits after the lock.

Option 2: return to a copy taken before the lock. If the corrections must be dated inside the locked period, the only route that keeps Odoo's controls in place is a database copy from before the hard lock was saved. Anything recorded after that copy was made would need to be entered again. To find the right copy, check when the lock was set: the company record keeps a history of changes to its Hard Lock Date.

Check that it worked

1. Open the Accounting app and go to Accounting > Closing > Lock Dates. The Lock Journal Entries window opens. The Hard Lock field, in the red box at the bottom, shows the current date.
2. To see when it was set and by whom, open the Settings app, go to Users & Companies > Companies and open your company. The message history on the right lists each change to the Hard Lock Date with its date and author.
3. After posting a correction, open it and confirm that its date falls after the hard lock. A customer invoice shows an Accounting Date field when that date differs from the invoice date.

Avoid the same mistake next time

• Use Lock Everything during reviews. It blocks the same entries for all users, yet an administrator can still grant an exception for a late audit change. Keep the hard lock for final periods.
• Read the warning before saving. As soon as you change the Hard Lock field, the window shows the words This change is irreversible next to it.
• Clear loose ends first. Odoo refuses a hard lock while draft entries or unreconciled bank statement lines remain in the period, and offers a button to list them.
• Remember your branches. A hard lock set on a parent company also applies to every branch below it.

Steps verified on Odoo 19. Menus and labels can differ on other versions.

Common questions

Can an administrator remove a hard lock date in Odoo?

No. In Odoo 19 and 20 the company record rejects a blank or earlier hard lock date for every user, administrators included. The only allowed change is moving it to a later date that is not in the future.

Can a scheduled action or server action clear the hard lock date?

No. Scheduled and server actions save data through Odoo, so they run into the same check as the Lock Dates window and stop with an error. Only a direct database edit gets around it, which defeats the purpose of the lock.

Can I grant a lock date exception for the hard lock date?

No. Exceptions only apply to the soft lock dates, such as Lock Everything, Lock Sales, Lock Purchases and Lock Tax Return. The hard lock allows none.

What happens if I post an invoice dated in a hard-locked period?

Odoo still posts it but keeps it out of the locked period: the invoice date stays as entered and the Accounting Date moves to the first open date. The form shows a notice with that date before you post.

Who can set or move the hard lock date in Odoo?

Users whose Accounting access is set to Administrator. They change it in the Accounting app under Accounting > Closing > Lock Dates, and only to a later date that is not in the future.