SSRT detected that the same CD key is already in use or conflicts with an existing profile ownership record.

This can happen with old, shared, or non-unique Call of Duty 4 keys. It does not automatically mean you did anything wrong.

1. Open the SSRT Launcher.
2. Use the CD-key fixer in launcher options.
3. Reconnect to the SSRT server.

You can also manually change your CD key, then reconnect.

Contact an admin with your in-game name and the exact kick message. Do not post private keys publicly.