add LMQ prefix
diff --git a/mqtt-ds/src/main/java/org/apache/rocketmq/mqtt/ds/store/LmqOffsetStoreManager.java b/mqtt-ds/src/main/java/org/apache/rocketmq/mqtt/ds/store/LmqOffsetStoreManager.java
index fd8d718..e9f87e6 100644
--- a/mqtt-ds/src/main/java/org/apache/rocketmq/mqtt/ds/store/LmqOffsetStoreManager.java
+++ b/mqtt-ds/src/main/java/org/apache/rocketmq/mqtt/ds/store/LmqOffsetStoreManager.java
@@ -80,7 +80,7 @@
                     String brokerAddress = tmpBrokerAddressMap.get(queue.getBrokerName());
                     QueueOffset queueOffset = each.getValue();
                     UpdateConsumerOffsetRequestHeader updateHeader = new UpdateConsumerOffsetRequestHeader();
-                    updateHeader.setTopic(StringUtils.replace(queue.getQueueName(), "/","%"));
+                    updateHeader.setTopic(MixAll.LMQ_PREFIX + StringUtils.replace(queue.getQueueName(), "/","%"));
                     updateHeader.setConsumerGroup(MixAll.LMQ_PREFIX + clientId);
                     updateHeader.setQueueId((int) queue.getQueueId());
                     updateHeader.setCommitOffset(queueOffset.getOffset());
@@ -111,7 +111,7 @@
                 map.put(queue, queueOffset);
                 try {
                     QueryConsumerOffsetRequestHeader queryHeader = new QueryConsumerOffsetRequestHeader();
-                    queryHeader.setTopic(StringUtils.replace(queue.getQueueName(), "/","%"));
+                    queryHeader.setTopic(MixAll.LMQ_PREFIX + StringUtils.replace(queue.getQueueName(), "/","%"));
                     queryHeader.setConsumerGroup(MixAll.LMQ_PREFIX + clientId);
                     queryHeader.setQueueId((int) queue.getQueueId());
                     long offset = defaultMQPullConsumer