409: Conflict error

Hello,

i installed ejabberd on my server and basicly its running fine.
However there is an issue i can't explaint myself, I don't even know it's a fault of the server.

I have created a MUC-Room where the users can connect to. Sometimes one of them looses the connection to the server due to internet issues and when they
want to reconnect they get a 409: Conflict error.
In order to be able to reconnect the admin (me) has to kick them manually of the room.

Does anyone have an idea how to solve this issue?

Best regards

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