Already logged in onto RTB connect?

[|Orange|]

When I logged in today, I got this error in RTB:

I really don't know whats going on, is someone using my key? Or is it a simple glitch? Otherwise, I never gave my key to anyone, and all other machines I used Blockland on I removed my key from.

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[|Orange|]

Locking, I had 2 Blockland windows up.