diff --git a/src/lua_binding_functions.c b/src/lua_binding_functions.c
index 77b2058..791a474 100644
--- a/src/lua_binding_functions.c
+++ b/src/lua_binding_functions.c
@@ -489,6 +489,9 @@ int lua_mq_update_topic(lua_State *state)
             luaL_unref(state, LUA_REGISTRYINDEX, private_ref);
             return 0;
         }
+#ifdef LUAPLUGIN_BASIC_UNITTEST
+        LOGDEBUG("update topic, id %d %d %d", topic_id, private_ref, free_ref);
+#endif
 
         mq->freemessage_ref = free_ref;
         mq->mq_private_ref = private_ref;
@@ -503,12 +506,15 @@ int lua_mq_update_topic(lua_State *state)
         lua_rawgeti(state, LUA_REGISTRYINDEX, private_ref);
         lua_pushlightuserdata(state, (void *)mq);        /* stack top new_mq */
         lua_setfield(state, -2, LUA_MQ_ENV_DEFAULT_KEY); /* stack top table */
-        luaL_unref(state, LUA_REGISTRYINDEX, mq->mq_private_ref);
+        // luaL_unref(state, LUA_REGISTRYINDEX, mq->mq_private_ref);
         mq->mq_private_ref = private_ref;
-
         /* 更新free function ref */
-        luaL_unref(state, LUA_REGISTRYINDEX, mq->freemessage_ref);
+        // luaL_unref(state, LUA_REGISTRYINDEX, mq->freemessage_ref);
         mq->freemessage_ref = free_ref;
+
+#ifdef LUAPLUGIN_BASIC_UNITTEST
+        LOGDEBUG("update topic, id %d %d %d", topic_id, private_ref, free_ref);
+#endif
     }
 
     lua_settop(state, 0);