diff --git a/src/metldata/builtin_transformations/common/utils.py b/src/metldata/builtin_transformations/common/utils.py
index 88382b2..82ab279 100644
--- a/src/metldata/builtin_transformations/common/utils.py
+++ b/src/metldata/builtin_transformations/common/utils.py
@@ -29,7 +29,7 @@
 
 def model_to_dict(model: SchemaPack) -> dict[str, Any]:
     """Converts the provided SchemaPack model to a dictionary."""
-    return json.loads(dumps_schemapack(deepcopy(model), yaml_format=False))
+    return json.loads(dumps_schemapack(model, yaml_format=False))
 
 
 def data_to_dict(data: DataPack) -> dict[str, Any]: