Problem: After migrating from a staging to a production environment, the client is experiencing an issue where the development registration key message appears in the production environment, despite using WP Migrate and excluding the WPML plugin from the migration process. Solution: If you're experiencing this issue, we recommend you try the following steps: 1. Temporarily remove your live website from your WPML account sites here: https://wpml.org/account/sites/ 2. Add the website again and copy the new generated key. 3. Remove the WPML plugins and install them again. 4. Navigate to Plugins -> Add New -> Commercial. 5. Click on 'Register WPML' and enter the new key you just created. The warning should disappear automatically after that in a few days maximum.
If this solution doesn't look relevant, please open a new support ticket in our forum: WPML support forum.