diff --git a/ampel/util/collections.py b/ampel/util/collections.py
index 8608d05f..8a9e6ad3 100755
--- a/ampel/util/collections.py
+++ b/ampel/util/collections.py
@@ -90,14 +90,6 @@ def try_reduce(arg: Any) -> Any:
 	return arg
 
 
-@overload
-def to_set(arg: StrictIterable[T]) -> set[T]:
-	...
-
-@overload
-def to_set(arg: _T) -> set[_T]:
-	...
-
 def to_set(arg) -> set:
 	"""
 	Reminder of python questionable logic:
diff --git a/pyproject.toml b/pyproject.toml
index 2567dd1e..7faa1302 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -1,6 +1,6 @@
 [tool.poetry]
 name = "ampel-interface"
-version = "0.10.4a1"
+version = "0.10.4a2"
 description = "Base classes for the Ampel analysis platform"
 authors = ["Valery Brinnel"]
 maintainers = ["Jakob van Santen <jakob.van.santen@desy.de>"]