diff --git a/freqtrade/persistence/models.py b/freqtrade/persistence/models.py
index 3f1661ee2..189b80fa6 100644
--- a/freqtrade/persistence/models.py
+++ b/freqtrade/persistence/models.py
@@ -79,8 +79,8 @@ def init_db(db_url: str) -> None:
     Order.session = Trade.session
     PairLock.session = Trade.session
     _KeyValueStoreModel.session = Trade.session
-    CustomData._session = scoped_session(sessionmaker(bind=engine, autoflush=True),
-                                         scopefunc=get_request_or_thread_id)
+    CustomData.session = scoped_session(sessionmaker(bind=engine, autoflush=True),
+                                        scopefunc=get_request_or_thread_id)
 
     previous_tables = inspect(engine).get_table_names()
     ModelBase.metadata.create_all(engine)
diff --git a/tests/rpc/test_rpc_telegram.py b/tests/rpc/test_rpc_telegram.py
index 110cd7819..45268b23b 100644
--- a/tests/rpc/test_rpc_telegram.py
+++ b/tests/rpc/test_rpc_telegram.py
@@ -150,7 +150,7 @@ def test_telegram_init(default_conf, mocker, caplog) -> None:
                    "['stopbuy', 'stopentry'], ['whitelist'], ['blacklist'], "
                    "['bl_delete', 'blacklist_delete'], "
                    "['logs'], ['edge'], ['health'], ['help'], ['version'], ['marketdir'], "
-                   "['order']], ['list_custom_data']")
+                   "['order'], ['list_custom_data']]")
 
     assert log_has(message_str, caplog)