If anyone else encounters the issue mentioned in this post, specifically seeing the message "This device is no longer associated with its previous account" in the Tapo app while managing the smart devices, please contact the support team and submit the following information for further analysis:

1. After the error occurs, submit an app log within the app for issue analysis.
2. Contact support via email and include the following information:
   • A screenshot of the error, the specific time it occurred, and your time zone.
   • Any other relevant information related to this case, such as your product model, firmware and hardware versions, app version, frequency of the error, and the scenarios that trigger the error.
   • State that the App log has been submitted for problem analysis.