[Resolved] WPML keeps showing old site key even after full reset

Problem:
The client is unable to unregister WPML from their site and register it with a new site key. Despite resetting WPML completely, deleting relevant options from the database, removing and reinstalling the plugins, and deleting all sites from their WPML account, the old site key reappears and remains registered until 2027.
Solution:
If you're experiencing this issue, we recommend you try the following steps:
1. Take a backup of your site first for safety reasons.
2. Temporarily deactivate the HelloPack Client plugin.
3. Follow these steps to unregister and re-register the WPML plugins:
- Login to your WPML.org account and go to the Sites page: https://wpml.org/account/sites/
- Delete the existing site key by pressing the little trash icon (if the key exists for that site).
- Login to your site and go to the Dashboard >> Plugins >> Add new > Commercial tab and click the Unregister WPML from this site link if that link exists.
- Then click the Register WPML link.
- Click the Get a key for this site link.
- It will generate the Key for your site.
- Copy the key, and paste it back into the input box, and press the Register button.
4. Once done, reactivate the HelloPack Client plugin.

If this solution does not resolve your issue, or if it seems outdated or irrelevant to your case, we highly recommend checking related known issues at https://wpml.org/known-issues/, verifying the version of the permanent fix, and confirming that you have installed the latest versions of themes and plugins. If further assistance is needed, please open a new support ticket at WPML support forum.