diff --git a/apps/emqx_retainer/src/emqx_retainer.erl b/apps/emqx_retainer/src/emqx_retainer.erl
index fbf5e8e24..15f74353c 100644
--- a/apps/emqx_retainer/src/emqx_retainer.erl
+++ b/apps/emqx_retainer/src/emqx_retainer.erl
@@ -425,17 +425,7 @@ get_backend_module() ->
 
 create_resource(Context, #{type := built_in_database} = Cfg) ->
     emqx_retainer_mnesia:create_resource(Cfg),
-    Context;
-create_resource(Context, #{type := DB} = Config) ->
-    ResourceID = erlang:iolist_to_binary([io_lib:format("~ts_~ts", [?APP, DB])]),
-    _ = emqx_resource:create(
-        ResourceID,
-        <<"emqx_retainer">>,
-        list_to_existing_atom(io_lib:format("~ts_~ts", [emqx_connector, DB])),
-        Config,
-        #{}
-    ),
-    Context#{resource_id => ResourceID}.
+    Context.
 
 -spec close_resource(context()) -> ok | {error, term()}.
 close_resource(#{resource_id := ResourceId}) ->