fix

freqtrade/rpc/rpc.py

@@ -7,7 +7,7 @@ from abc import abstractmethod
 from collections.abc import Generator, Sequence
 from datetime import date, datetime, timedelta, timezone
 from math import isnan
-from typing import Any, TYPE_CHECKING, Optional
+from typing import TYPE_CHECKING, Any
 
 import psutil
 from dateutil.relativedelta import relativedelta
@@ -1116,7 +1116,7 @@ class RPC:
                 "cancel_order_count": c_count,
             }
 
-    def _rpc_list_custom_data(self, trade_id: Optional[int] = None, key: Optional[str] = None) -> list[dict[str, Any]]:
+    def _rpc_list_custom_data(self, trade_id: int | None = None, key: str | None = None) -> list[dict[str, Any]]:
         """
         Fetch custom data for a specific trade, or all open trades if `trade_id` is not provided.
         """