diff --git a/reactivated/serialization/__init__.py b/reactivated/serialization/__init__.py
index 595e7295a..42772be08 100644
--- a/reactivated/serialization/__init__.py
+++ b/reactivated/serialization/__init__.py
@@ -340,6 +340,8 @@ def get_serialized_value(
             else class_or_instance()
         )
 
+        name = f"{value.__class__.__module__}.{value.__class__.__qualname__}"
+
         for field in value:
             if (
                 isinstance(field.field, django_forms.ModelChoiceField)
@@ -347,6 +349,14 @@ def get_serialized_value(
             ):
                 field.field.queryset = field.field.queryset.none()
 
+            if (
+                callable(field.field.initial)
+                and schema.definitions.get("is_static_context") is True  # type: ignore[comparison-overlap]
+            ):
+                assert (
+                    False
+                ), f"Callables are not supported in initial/default values for field {field.name} in form {name}"
+
         form = value
         context = form.get_context()  # type: ignore[attr-defined]
 
@@ -362,9 +372,7 @@ def get_serialized_value(
         value.fields = {**hidden_fields, **visible_fields}
 
         serialized = serialize(value, schema, suppress_custom_serializer=True)
-        serialized[
-            "name"
-        ] = f"{value.__class__.__module__}.{value.__class__.__qualname__}"
+        serialized["name"] = name
         serialized["prefix"] = form.prefix or ""
         serialized["iterator"] = list(hidden_fields.keys()) + list(
             visible_fields.keys()