diff --git a/invokeai/app/services/object_serializer/object_serializer_disk.py b/invokeai/app/services/object_serializer/object_serializer_disk.py
index 935fec3060..7e28320ff2 100644
--- a/invokeai/app/services/object_serializer/object_serializer_disk.py
+++ b/invokeai/app/services/object_serializer/object_serializer_disk.py
@@ -1,3 +1,4 @@
+import threading
 import tempfile
 import typing
 from dataclasses import dataclass
@@ -70,7 +71,8 @@ class ObjectSerializerDisk(ObjectSerializerBase[T]):
         return self._output_dir / name
 
     def _new_name(self) -> str:
-        return f"{self._obj_class_name}_{uuid_string()}"
+        tid = threading.current_thread().ident
+        return f"{self._obj_class_name}_{tid}_{uuid_string()}"
 
     def _tempdir_cleanup(self) -> None:
         """Calls `cleanup` on the temporary directory, if it exists."""