fix(interactive): Minor fix for Interactive Metadata store (#4449)

Fix #4443

flex/engines/http_server/actor/admin_actor.act.cc

@@ -930,9 +930,29 @@ seastar::future<admin_query_result> admin_actor::start_service(
     return seastar::make_ready_future<admin_query_result>(
         gs::Result<seastar::sstring>(plugins_res.status()));
   }
+  // Note that the plugin meta contains both builtin and user-defined plugins,
+  // we need to remove the builtin plugins from the plugin meta.
+  auto& graph_meta = get_graph_res.value();
+  auto& additional_plugins = plugins_res.value();
+  const auto& all_builtin_plugins = gs::get_builtin_plugin_metas();
+  for (const auto& builtin_plugin : all_builtin_plugins) {
+    auto it =
+        std::remove_if(additional_plugins.begin(), additional_plugins.end(),
+                       [&builtin_plugin](const gs::PluginMeta& plugin_meta) {
+                         return plugin_meta.id == builtin_plugin.id;
+                       });
+    additional_plugins.erase(it, additional_plugins.end());
+    auto it2 = std::remove_if(
+        graph_meta.plugin_metas.begin(), graph_meta.plugin_metas.end(),
+        [&builtin_plugin](const gs::PluginMeta& plugin_meta) {
+          return plugin_meta.id == builtin_plugin.id;
+        });
+    graph_meta.plugin_metas.erase(it2, graph_meta.plugin_metas.end());
+  }
+
   // With all enabled plugins and graph schema, dump to a new schema file.
-  auto dump_res = WorkDirManipulator::DumpGraphSchema(get_graph_res.value(),
-                                                      plugins_res.value());
+  auto dump_res =
+      WorkDirManipulator::DumpGraphSchema(graph_meta, additional_plugins);
   if (!dump_res.ok()) {
     LOG(ERROR) << "Fail to dump graph schema: "
                << dump_res.status().error_message();