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Problem:
The client's developer reported an issue where after copying the production environment to the development environment, WPML prompts to purchase again and displays a message about using an expired account, which could lead to stability and security issues.
Solution:
If you're experiencing this issue, we recommend unregistering WPML on your staging site and then registering it again with a new site key, as one key is valid for only one URL.

This solution might be irrelevant if it's outdated or not applicable to your case.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 the issue persists, please open a new support ticket at WPML support forum.