From ca4029a715d1e142c29ada1b1cb8df91bd3112e0 Mon Sep 17 00:00:00 2001
From: Harshit Jain <48647625+Harshit28j@users.noreply.github.com>
Date: Mon, 16 Feb 2026 13:53:26 +0000
Subject: [PATCH] fix req changes

---
 litellm/litellm_core_utils/litellm_logging.py | 16 +++++++++++++---
 1 file changed, 13 insertions(+), 3 deletions(-)

diff --git a/litellm/litellm_core_utils/litellm_logging.py b/litellm/litellm_core_utils/litellm_logging.py
index b7b336dbbe9..b2aee6bd2a0 100644
--- a/litellm/litellm_core_utils/litellm_logging.py
+++ b/litellm/litellm_core_utils/litellm_logging.py
@@ -3184,9 +3184,19 @@ class Logging(LiteLLMLoggingBaseClass):
                 f"[LANGFUSE DEBUG] Langfuse logger kept: {self._get_callback_name(langfuse_logger_found)}"
             )
 
-        # Don't use set() - it breaks deduplication for callback instances
-        # The filtering logic above already handles deduplication
-        return filtered
+        # After Langfuse filtering, deduplicate remaining callbacks
+        seen = set()
+        final = []
+        for cb in filtered:
+            cb_id = id(cb) if not isinstance(cb, str) else cb
+            if cb_id not in seen:
+                seen.add(cb_id)
+                final.append(cb)
+            else:
+                verbose_logger.debug(
+                    f"LiteLLM Logging: Skipping duplicate callback: {self._get_callback_name(cb)}"
+                )
+        return final
 
     def _remove_internal_litellm_callbacks(self, callbacks: List) -> List:
         """