diff --git a/hamilton/function_modifiers/recursive.py b/hamilton/function_modifiers/recursive.py
index 72c9160c4..d86ad74f1 100644
--- a/hamilton/function_modifiers/recursive.py
+++ b/hamilton/function_modifiers/recursive.py
@@ -147,6 +147,11 @@ def _resolve_subdag_configuration(
             sources_to_map[key] = value.source
         elif isinstance(value, dependencies.LiteralDependency):
             values_to_include[key] = value.value
+        elif isinstance(value, (dependencies.GroupedDependency, dependencies.SingleDependency)):
+            raise InvalidDecoratorException(
+                f"`{value}` is not allowed in the config= part of the subdag decorator. "
+                "Please use `configuration()` or `value()` or literal python values."
+            )
     plain_configs = {
         k: v for k, v in fields.items() if k not in sources_to_map and k not in values_to_include
     }
diff --git a/tests/function_modifiers/test_recursive.py b/tests/function_modifiers/test_recursive.py
index 6cdcf1065..f2f35ee71 100644
--- a/tests/function_modifiers/test_recursive.py
+++ b/tests/function_modifiers/test_recursive.py
@@ -11,6 +11,7 @@
     InvalidDecoratorException,
     config,
     configuration,
+    group,
     parameterized_subdag,
     recursive,
     subdag,
@@ -497,6 +498,18 @@ def test_resolve_subdag_configuration_bad_mapping():
         recursive._resolve_subdag_configuration(_configuration, fields, "test")
 
 
+def test_resolve_subdag_configuration_flag_incorrect_source_group_deps():
+    _configuration = {"a": 1, "b": 2}
+    with pytest.raises(InvalidDecoratorException):
+        recursive._resolve_subdag_configuration(
+            _configuration, {"c": value(3), "d": source("e")}, "test"
+        )
+    with pytest.raises(InvalidDecoratorException):
+        recursive._resolve_subdag_configuration(
+            _configuration, {"c": value(3), "d": group(source("e"))}, "test"
+        )
+
+
 def test_subdag_with_external_nodes_input():
     def bar(input_1: int) -> int:
         return input_1 + 1