RuPost. Ошибка "remaining connection slots are reserved for non-replication superuser connections"

/var/log/rupost/monitor.log

<ДАТА> <ВРЕМЯ> - Monitor - ERROR - mailadmin - <АДРЕС_КЛИЕНТА>: https://<АДРЕС_УЗЛА_RUPOST>:5000/api/cluster-monitoring-instance-service -  -  - cluster_monitor_service_instance_api,(InstanceServiceActionHandler)dispatch,(InstanceServiceActionHandler)instance_service_status,check_status_own,scan_status_all,(AdapterMDA)receive_status,(AdapterMDA)analyze_logs - <UUID_ЭКЗЕМПЛЯРА_УЗЛА> - <АДРЕС_УЗЛА_RUPOST>:5000 - 6031 - Обнаружена ошибка в работе dovecot:  remaining connection slots are reserved for non-replication superuser connections (state: wait for input) - ('<ДАТА>T<ВРЕМЯ>', 'auth-worker(<PID_ПРОЦЕССА>): Error: pgsql(<АДРЕС_СУБД>): Connect failed to database rupost: FATAL:  remaining connection slots are reserved for non-replication superuser connections (state: wait for input)')

/var/log/mail.log

<ДАТА> <ВРЕМЯ> <ИМЯ_УЗЛА_RUPOST> main/proxymap[<PID_ПРОЦЕССА>]: warning: connect to pgsql server postgresql://rupost:<ИМЯ_ПОЛЬЗОВАТЕЛЯ>@<АДРЕС_СУБД>:<ПОРТ_СУБД>/rupost?sslmode=prefer&application_name=rupost-mta: FATAL:  remaining connection slots are reserved for non-replication superuser connections?
<ДАТА> <ВРЕМЯ> <ИМЯ_УЗЛА_RUPOST> main/smtpd[<PID_ПРОЦЕССА>]: warning: proxy:pgsql:/etc/postfix/pgsql_resources_access lookup error for "123@demo.local"