Failed to connect (Already on another server). Help please.

I’m having an issue connecting the my server (I am the owner of the server). every time I disconnect from it and try to reconnect it says “Failed to connect (Already on another server)” and I eventually have to restart my server in order to log back in. Does anyone know of a solution for this issue or is experiencing similar problems?

So any solution yet?
Have the same problem, can’t play on my server for more than 36 hours now.

PS: the server has no admins, so noone can kick my ghost.

No solutions as of yet. I am the owner of the server and i have to restart everytime i want to log in.