The system ran out of agent seats and has to restart.
The system has no more agent seats and needs to restart.
The system has exhausted its supply of agent seats and must restart.
The system has run out of agent seats and must restart.
The system has no available agent seats and must restart.
The system has no more agent seats and must restart.
The system has reached its maximum number of agent seats and must restart.
The system has no free agent seats and must restart.
The system has no unused agent seats and must restart.
The system has no more agent seats left and must restart.
The system has no agent seats available and must restart.
The system has no agent seats left and must restart.
The system has no agent seats remaining and must restart.
The system has no agent seats to offer and must restart.
The system has no more agent seats and must be restarted.
The system has no agent seats and must be restarted.
The system has run out of agent seats and must be restarted.
The system has no agent seats left and must be restarted.
The system has no agent seats remaining and must be restarted.
The system has no agent seats to offer and must be restarted.