diff --git a/langfuse/langchain/utils.py b/langfuse/langchain/utils.py
index 5880e9624..abbd9e70d 100644
--- a/langfuse/langchain/utils.py
+++ b/langfuse/langchain/utils.py
@@ -53,12 +53,25 @@ def _extract_model_name(
             return kwargs.get("invocation_params").get("model_name")
 
         deployment_name = None
-        if serialized.get("kwargs").get("openai_api_version"):
-            deployment_name = serialized.get("kwargs").get("deployment_version")
         deployment_version = None
+
+        if serialized.get("kwargs").get("openai_api_version"):
+            deployment_version = serialized.get("kwargs").get("deployment_version")
+
         if serialized.get("kwargs").get("deployment_name"):
             deployment_name = serialized.get("kwargs").get("deployment_name")
-        return deployment_name + "-" + deployment_version
+
+        if not isinstance(deployment_name, str):
+            return None
+
+        if not isinstance(deployment_version, str):
+            return deployment_name
+
+        return (
+            deployment_name + "-" + deployment_version
+            if deployment_version not in deployment_name
+            else deployment_name
+        )
 
     # Third, for some models, we are unable to extract the model by a path in an object. Langfuse provides us with a string representation of the model pbjects
     # We use regex to extract the model from the repr string