diff --git a/ninja_schema/orm/model_schema.py b/ninja_schema/orm/model_schema.py
index 3497504..55887ba 100755
--- a/ninja_schema/orm/model_schema.py
+++ b/ninja_schema/orm/model_schema.py
@@ -247,9 +247,11 @@ def __init__(
 
     @classmethod
     def clone_field(cls, field: FieldInfo, **kwargs: Any) -> FieldInfo:
-        field_dict = dict(field.__repr_args__())
-        field_dict.update(**kwargs)
-        new_field = FieldInfo(**field_dict)  # type: ignore
+        new_field = field._copy()
+        for key, value in kwargs.items():
+            setattr(new_field, key, value)
+        new_field.rebuild_annotation()
+        
         return new_field
 
     def model_fields(self) -> Iterator[Field]:
diff --git a/tests/test_v2_pydantic/test_model_schema.py b/tests/test_v2_pydantic/test_model_schema.py
index 3b92551..4fffc0e 100644
--- a/tests/test_v2_pydantic/test_model_schema.py
+++ b/tests/test_v2_pydantic/test_model_schema.py
@@ -227,7 +227,7 @@ class Config:
                     "description": "",
                     "title": "Title",
                 },
-                "category": {
+                "category_id": {
                     "anyOf": [{"type": "integer"}, {"type": "null"}],
                     "default": None,
                     "description": "",