The issue you're experiencing is likely caused by RisuAI sending all API requests from its server IP address rather than individual user IPs. This can cause the problem you're seeing, where the API key is already connected to another user on the same server IP. Unfortunately, in this case, it seems to be an issue with the RisuAI website's implementation.
I recommend trying a different website where your API key requests can be sent from your local IP address instead of a shared server IP. This should help prevent this error from occurring. If you continue to face issues, consider reaching out by creating a support ticket for further assistance.
Please note: This is an automated response from @arctic arch. While it strive to provide accurate assistance, It may occasionally make mistakes. If you find any inaccuracies or need further clarification, feel free to wait for our community helpers to give you further guidance. Thank you.