Granted QOS different to Requested QOS

EMQ重新安裝後,項目開啓的時候報錯: Granted QOS different to Requested QOS; topics: [$SYS/brokers/+/clients/+/connected, $SYS/brokers/+/clients/+/disconnected] requested: [1, 1] granted: [128, 128] 原因大概就是要允許客戶端訂閱"$SY
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