diff --git a/numalogic/udfs/__main__.py b/numalogic/udfs/__main__.py
index d787df95..5c63936d 100644
--- a/numalogic/udfs/__main__.py
+++ b/numalogic/udfs/__main__.py
@@ -17,8 +17,6 @@
 
 redis_client = get_redis_client_from_conf(pipeline_conf.redis_conf)
 
-for key in redis_client.scan_iter("*"):
-    redis_client.delete(key)
 if __name__ == "__main__":
     set_logger()
     step = sys.argv[1]
diff --git a/numalogic/udfs/entities.py b/numalogic/udfs/entities.py
index 4044e6e5..ba4f75bd 100644
--- a/numalogic/udfs/entities.py
+++ b/numalogic/udfs/entities.py
@@ -81,9 +81,6 @@ def get_data(self, original=False) -> npt.NDArray[float]:
     def get_metadata(self, key: str) -> dict[str, Any]:
         return copy(self.metadata[key])
 
-    def add_metadata(self, data: dict[str, Any]):
-        self.metadata.update(data)
-
     def __str__(self) -> str:
         return (
             f'"StreamPayload(header={self.header}, status={self.status}, '
diff --git a/numalogic/udfs/tools.py b/numalogic/udfs/tools.py
index 5c3ed61a..b2dee9de 100644
--- a/numalogic/udfs/tools.py
+++ b/numalogic/udfs/tools.py
@@ -131,7 +131,11 @@ def _load_artifact(
             skeys,
             dkeys,
         )
-        if artifact.metadata and "artifact_versions" in artifact.metadata:
+        if (
+            artifact.metadata
+            and "artifact_versions" in artifact.metadata
+            and "artifact_versions" not in payload.metadata
+        ):
             payload = replace(
                 payload,
                 metadata={
diff --git a/tests/udfs/test_inference.py b/tests/udfs/test_inference.py
index 5536cfec..ad07e3d4 100644
--- a/tests/udfs/test_inference.py
+++ b/tests/udfs/test_inference.py
@@ -84,7 +84,6 @@ class TestInferenceUDF(unittest.TestCase):
     def setUp(self) -> None:
         self.udf = InferenceUDF(REDIS_CLIENT)
         self.udf.register_conf("conf1", StreamConf(config_id="conf1"))
-        print(self.udf.get_conf("conf1"))
 
     @patch.object(
         RedisRegistry,
diff --git a/tests/udfs/test_postprocess.py b/tests/udfs/test_postprocess.py
index 20aa361f..4df25ca7 100644
--- a/tests/udfs/test_postprocess.py
+++ b/tests/udfs/test_postprocess.py
@@ -113,10 +113,8 @@ def test_postprocess_infer_model_stale(self):
         data = deepcopy(DATA)
         data["status"] = Status.ARTIFACT_STALE
         data["header"] = Header.MODEL_INFERENCE
-        print(
-            self.registry.save(
-                KEYS, ["StdDevThreshold"], StdDevThreshold().fit(np.asarray([[0, 1], [1, 2]]))
-            )
+        self.registry.save(
+            KEYS, ["StdDevThreshold"], StdDevThreshold().fit(np.asarray([[0, 1], [1, 2]]))
         )
         msg = self.udf(KEYS, Datum(keys=KEYS, value=orjson.dumps(data), **DATUM_KW))
         self.assertEqual(2, len(msg))