Hi,
Raise a support ticket at:  https://www.odoo.com/help
Thanks

Hello Yashika Agarwal, 

When you see the message "This database is currently locked" in Odoo Online, it means that your database has been temporarily deactivated due to inactivity. This is common in trial databases or free-tier instances that haven’t been used for an extended period. Here’s how you can resolve it:

Steps to Reactivate Your Database:

1. Click on "Reactivate": When prompted, click on the Reactivate button. This should notify Odoo's server to unlock the database. Usually, the database should be accessible within a few moments.
2. Log in to Odoo.com:
   • Go to Odoo.com and log in with your account credentials.
   • Navigate to My Databases in your account profile. Here, you should see a list of all your databases, including any that are inactive.
   • Find the locked database in the list and click on Activate or Unlock if available.
3. Check Database Access:
   • After reactivating, return to your original login page and try accessing the database again.
   • Sometimes it may take a few minutes for the reactivation to complete. If it still doesn’t show up after a few minutes, try refreshing your browser.
4. Contact Odoo Support (if reactivation fails):
   • If the database does not show up or you encounter further issues, it may require assistance from Odoo Support.
   • Go to Odoo’s Help Center and submit a ticket or reach out to their support team, especially if it’s a paid instance or critical database.

These steps should help you access your database again. Let me know if this helps!