已存在数据，不再插入

mec-biz/src/main/java/com/ym/mec/biz/service/impl/ImLiveBroadcastRoomServiceImpl.java

@@ -1891,6 +1891,16 @@ public class ImLiveBroadcastRoomServiceImpl extends ServiceImpl<ImLiveBroadcastR
         roomMember.setLiveRoomStatus(1);
         roomMember.setMicrophoneFlag(microphoneFlag);
 
+        ImLiveBroadcastRoomMember liveRoomMember = liveBroadcastRoomMemberService.lambdaQuery()
+                .eq(ImLiveBroadcastRoomMember::getTenantId, userInfo.getTenantId())
+                .eq(ImLiveBroadcastRoomMember::getRoomUid, imLiveBroadcastRoomVo.getRoomUid())
+                .eq(ImLiveBroadcastRoomMember::getUserId, userInfo.getUserId())
+                .list().stream().findFirst().orElse(null);
+        if (Objects.nonNull(liveRoomMember)) {
+           return userInfo;
+        }
+
+
         // 保存直播间用户信息
         liveBroadcastRoomMemberService.save(roomMember);