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+Disallow subscribing with QoS 2 for ingress MQTT bridges.
+Allow user to configure `clean_start` option for ingress MQTT bridges however.
diff --git a/changes/v5.0.17/fix-9952.zh.md b/changes/v5.0.17/fix-9952.zh.md
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+不允许对 ingress MQTT 网桥的 QoS 2 进行订阅。
+但允许用户为 ingress MQTT 桥配置 "clean_start" 选项。