diff --git a/apps/emqx/src/bhvrs/emqx_config_backup.erl b/apps/emqx/src/bhvrs/emqx_config_backup.erl
index e4818a871..1ec08c23b 100644
--- a/apps/emqx/src/bhvrs/emqx_config_backup.erl
+++ b/apps/emqx/src/bhvrs/emqx_config_backup.erl
@@ -16,9 +16,14 @@
 
 -module(emqx_config_backup).
 
+-type ok_result() :: #{
+    root_key => emqx_utils_maps:config_key(),
+    changed => [emqx_utils_maps:config_key_path()]
+}.
+
+-type error_result() :: #{root_key => emqx_utils_maps:config_key(), reason => term()}.
+
 -callback import_config(RawConf :: map()) ->
-    {ok, #{
-        root_key => emqx_utils_maps:config_key(),
-        changed => [emqx_utils_maps:config_key_path()]
-    }}
-    | {error, #{root_key => emqx_utils_maps:config_key(), reason => term()}}.
+    {ok, ok_result()}
+    | {error, error_result()}
+    | {results, {[ok_result()], [error_result()]}}.
diff --git a/apps/emqx_bridge/src/emqx_bridge.app.src b/apps/emqx_bridge/src/emqx_bridge.app.src
index 9ef567f23..57dbc26ba 100644
--- a/apps/emqx_bridge/src/emqx_bridge.app.src
+++ b/apps/emqx_bridge/src/emqx_bridge.app.src
@@ -1,7 +1,7 @@
 %% -*- mode: erlang -*-
 {application, emqx_bridge, [
     {description, "EMQX bridges"},
-    {vsn, "0.1.34"},
+    {vsn, "0.1.35"},
     {registered, [emqx_bridge_sup]},
     {mod, {emqx_bridge_app, []}},
     {applications, [
diff --git a/apps/emqx_bridge/src/emqx_bridge_v2.erl b/apps/emqx_bridge/src/emqx_bridge_v2.erl
index e834dc42e..e6feac7bd 100644
--- a/apps/emqx_bridge/src/emqx_bridge_v2.erl
+++ b/apps/emqx_bridge/src/emqx_bridge_v2.erl
@@ -1030,7 +1030,26 @@ bridge_v2_type_to_connector_type(Type) ->
 
 import_config(RawConf) ->
     %% actions structure
-    emqx_bridge:import_config(RawConf, <<"actions">>, ?ROOT_KEY_ACTIONS, config_key_path()).
+    ActionRes = emqx_bridge:import_config(
+        RawConf, <<"actions">>, ?ROOT_KEY_ACTIONS, config_key_path()
+    ),
+    SourceRes = emqx_bridge:import_config(
+        RawConf, <<"sources">>, ?ROOT_KEY_SOURCES, config_key_path_sources()
+    ),
+    group_import_results([ActionRes, SourceRes]).
+
+group_import_results(Results0) ->
+    Results = lists:foldr(
+        fun
+            ({ok, OkRes}, {OkAcc, ErrAcc}) ->
+                {[OkRes | OkAcc], ErrAcc};
+            ({error, ErrRes}, {OkAcc, ErrAcc}) ->
+                {OkAcc, [ErrRes | ErrAcc]}
+        end,
+        {[], []},
+        Results0
+    ),
+    {results, Results}.
 
 %%====================================================================
 %% Config Update Handler API
diff --git a/apps/emqx_management/src/emqx_mgmt_data_backup.erl b/apps/emqx_management/src/emqx_mgmt_data_backup.erl
index 2aaa014a8..03eb7ac06 100644
--- a/apps/emqx_management/src/emqx_mgmt_data_backup.erl
+++ b/apps/emqx_management/src/emqx_mgmt_data_backup.erl
@@ -773,23 +773,42 @@ validate_cluster_hocon(RawConf) ->
 do_import_conf(RawConf, Opts) ->
     GenConfErrs = filter_errors(maps:from_list(import_generic_conf(RawConf))),
     maybe_print_conf_errors(GenConfErrs, Opts),
-    Errors =
-        lists:foldl(
-            fun(Module, ErrorsAcc) ->
-                case Module:import_config(RawConf) of
-                    {ok, #{changed := Changed}} ->
-                        maybe_print_changed(Changed, Opts),
-                        ErrorsAcc;
-                    {error, #{root_key := RootKey, reason := Reason}} ->
-                        ErrorsAcc#{[RootKey] => Reason}
-                end
-            end,
-            GenConfErrs,
-            sort_importer_modules(find_behaviours(emqx_config_backup))
-        ),
+    Modules = sort_importer_modules(find_behaviours(emqx_config_backup)),
+    Errors = lists:foldl(print_ok_results_collect_errors(RawConf, Opts), GenConfErrs, Modules),
     maybe_print_conf_errors(Errors, Opts),
     Errors.
 
+print_ok_results_collect_errors(RawConf, Opts) ->
+    fun(Module, Errors) ->
+        case Module:import_config(RawConf) of
+            {results, {OkResults, ErrResults}} ->
+                print_ok_results(OkResults, Opts),
+                collect_errors(ErrResults, Errors);
+            {ok, OkResult} ->
+                print_ok_results([OkResult], Opts),
+                Errors;
+            {error, ErrResult} ->
+                collect_errors([ErrResult], Errors)
+        end
+    end.
+
+print_ok_results(Results, Opts) ->
+    lists:foreach(
+        fun(#{changed := Changed}) ->
+            maybe_print_changed(Changed, Opts)
+        end,
+        Results
+    ).
+
+collect_errors(Results, Errors) ->
+    lists:foldr(
+        fun(#{root_key := RootKey, reason := Reason}, Acc) ->
+            Acc#{[RootKey] => Reason}
+        end,
+        Errors,
+        Results
+    ).
+
 sort_importer_modules(Modules) ->
     lists:sort(
         fun(M1, M2) -> order(M1, ?IMPORT_ORDER) =< order(M2, ?IMPORT_ORDER) end,
diff --git a/apps/emqx_management/test/emqx_mgmt_data_backup_SUITE.erl b/apps/emqx_management/test/emqx_mgmt_data_backup_SUITE.erl
index 36a838743..fee392479 100644
--- a/apps/emqx_management/test/emqx_mgmt_data_backup_SUITE.erl
+++ b/apps/emqx_management/test/emqx_mgmt_data_backup_SUITE.erl
@@ -18,6 +18,7 @@
 -compile(export_all).
 -compile(nowarn_export_all).
 
+-include_lib("emqx_utils/include/emqx_message.hrl").
 -include_lib("eunit/include/eunit.hrl").
 -include_lib("common_test/include/ct.hrl").
 -include_lib("snabbkaffe/include/snabbkaffe.hrl").
@@ -86,6 +87,33 @@ t_empty_export_import(_Config) ->
     ?assertEqual(Exp, emqx_mgmt_data_backup:import(FileName)),
     ?assertEqual(ExpRawConf, emqx:get_raw_config([])).
 
+t_cluster_hocon_import_mqtt_subscribers_retainer_messages(Config) ->
+    case emqx_release:edition() of
+        ce ->
+            ok;
+        ee ->
+            FNameEmqx44 = "emqx-export-4.4.24-retainer-mqttsub.tar.gz",
+            BackupFile = filename:join(?config(data_dir, Config), FNameEmqx44),
+            Exp = {ok, #{db_errors => #{}, config_errors => #{}}},
+            ?assertEqual(Exp, emqx_mgmt_data_backup:import(BackupFile)),
+            RawConfAfterImport = emqx:get_raw_config([]),
+            %% verify that MQTT sources are imported
+            ?assertMatch(
+                #{<<"sources">> := #{<<"mqtt">> := Sources}} when map_size(Sources) > 0,
+                RawConfAfterImport
+            ),
+            %% verify that retainer messages are imported
+            ?assertMatch(
+                {ok, [#message{payload = <<"test-payload">>}]},
+                emqx_retainer:read_message(<<"test-retained-message/1">>)
+            ),
+            %% Export and import again
+            {ok, #{filename := FileName}} = emqx_mgmt_data_backup:export(),
+            ?assertEqual(Exp, emqx_mgmt_data_backup:import(FileName)),
+            ?assertEqual(RawConfAfterImport, emqx:get_raw_config([]))
+    end,
+    ok.
+
 t_cluster_hocon_export_import(Config) ->
     RawConfBeforeImport = emqx:get_raw_config([]),
     BootstrapFile = filename:join(?config(data_dir, Config), ?BOOTSTRAP_BACKUP),
diff --git a/apps/emqx_management/test/emqx_mgmt_data_backup_SUITE_data/emqx-export-4.4.24-retainer-mqttsub.tar.gz b/apps/emqx_management/test/emqx_mgmt_data_backup_SUITE_data/emqx-export-4.4.24-retainer-mqttsub.tar.gz
new file mode 100644
index 000000000..67133f19d
Binary files /dev/null and b/apps/emqx_management/test/emqx_mgmt_data_backup_SUITE_data/emqx-export-4.4.24-retainer-mqttsub.tar.gz differ
diff --git a/apps/emqx_retainer/src/emqx_retainer.app.src b/apps/emqx_retainer/src/emqx_retainer.app.src
index 248cc9310..4a8b3cdc3 100644
--- a/apps/emqx_retainer/src/emqx_retainer.app.src
+++ b/apps/emqx_retainer/src/emqx_retainer.app.src
@@ -2,7 +2,7 @@
 {application, emqx_retainer, [
     {description, "EMQX Retainer"},
     % strict semver, bump manually!
-    {vsn, "5.0.21"},
+    {vsn, "5.0.22"},
     {modules, []},
     {registered, [emqx_retainer_sup]},
     {applications, [kernel, stdlib, emqx, emqx_ctl]},
diff --git a/apps/emqx_retainer/src/emqx_retainer_mnesia.erl b/apps/emqx_retainer/src/emqx_retainer_mnesia.erl
index bdc1f2c67..7e2a73a09 100644
--- a/apps/emqx_retainer/src/emqx_retainer_mnesia.erl
+++ b/apps/emqx_retainer/src/emqx_retainer_mnesia.erl
@@ -17,6 +17,7 @@
 -module(emqx_retainer_mnesia).
 
 -behaviour(emqx_retainer).
+-behaviour(emqx_db_backup).
 
 -include("emqx_retainer.hrl").
 -include_lib("emqx/include/logger.hrl").
@@ -54,6 +55,8 @@
 -export([populate_index_meta/0]).
 -export([reindex/3]).
 
+-export([backup_tables/0]).
+
 -record(retained_message, {topic, msg, expiry_time}).
 -record(retained_index, {key, expiry_time}).
 -record(retained_index_meta, {key, read_indices, write_indices, reindexing, extra}).
@@ -73,6 +76,12 @@
 topics() ->
     [emqx_topic:join(I) || I <- mnesia:dirty_all_keys(?TAB_MESSAGE)].
 
+%%--------------------------------------------------------------------
+%% Data backup
+%%--------------------------------------------------------------------
+backup_tables() ->
+    [?TAB_MESSAGE].
+
 %%--------------------------------------------------------------------
 %% emqx_retainer callbacks
 %%--------------------------------------------------------------------
diff --git a/changes/ce/fix-12826.en.md b/changes/ce/fix-12826.en.md
new file mode 100644
index 000000000..28829cf87
--- /dev/null
+++ b/changes/ce/fix-12826.en.md
@@ -0,0 +1,6 @@
+Fixed an issue that prevented importing source data integrations and retained messages.
+
+Before the fix:
+
+- source data integrations are ignored from the backup file
+- importing the `mnesia` table for retained messages are not supported
diff --git a/scripts/find-apps.sh b/scripts/find-apps.sh
index 89f0a66e5..908f22d9c 100755
--- a/scripts/find-apps.sh
+++ b/scripts/find-apps.sh
@@ -101,6 +101,10 @@ matrix() {
                 entries+=("$(format_app_entry "$app" 1 emqx "$runner")")
                 entries+=("$(format_app_entry "$app" 1 emqx-enterprise "$runner")")
                 ;;
+            apps/emqx_management)
+                entries+=("$(format_app_entry "$app" 1 emqx "$runner")")
+                entries+=("$(format_app_entry "$app" 1 emqx-enterprise "$runner")")
+                ;;
             apps/*)
                 if [[ -f "${app}/BSL.txt" ]]; then
                     profile='emqx-enterprise'