diff --git a/changelog/3960.fixed.md b/changelog/3960.fixed.md
new file mode 100644
index 000000000..404569234
--- /dev/null
+++ b/changelog/3960.fixed.md
@@ -0,0 +1 @@
+- Fixed OpenAI Realtime, OpenAI Realtime Beta, and Grok realtime services treating `conversation_already_has_active_response` as a fatal error. These services now log it as a non-fatal debug event when a response is already in progress.
diff --git a/src/pipecat/services/grok/realtime/llm.py b/src/pipecat/services/grok/realtime/llm.py
index 7e252ebf5..39cf06a10 100644
--- a/src/pipecat/services/grok/realtime/llm.py
+++ b/src/pipecat/services/grok/realtime/llm.py
@@ -676,7 +676,10 @@ class GrokRealtimeLLMService(LLMService):
             elif evt.type == "response.function_call_arguments.done":
                 await self._handle_evt_function_call_arguments_done(evt)
             elif evt.type == "error":
-                if evt.error.code == "response_cancel_not_active":
+                if evt.error.code in (
+                    "response_cancel_not_active",
+                    "conversation_already_has_active_response",
+                ):
                     logger.debug(f"{self} {evt.error.message}")
                 else:
                     await self._handle_evt_error(evt)
diff --git a/src/pipecat/services/openai/realtime/llm.py b/src/pipecat/services/openai/realtime/llm.py
index c25181dd1..25afc0ef1 100644
--- a/src/pipecat/services/openai/realtime/llm.py
+++ b/src/pipecat/services/openai/realtime/llm.py
@@ -747,7 +747,10 @@ class OpenAIRealtimeLLMService(LLMService):
                 await self._handle_evt_function_call_arguments_done(evt)
             elif evt.type == "error":
                 if not await self._maybe_handle_evt_retrieve_conversation_item_error(evt):
-                    if evt.error.code == "response_cancel_not_active":
+                    if evt.error.code in (
+                        "response_cancel_not_active",
+                        "conversation_already_has_active_response",
+                    ):
                         logger.debug(f"{self} {evt.error.message}")
                     else:
                         await self._handle_evt_error(evt)
diff --git a/src/pipecat/services/openai_realtime_beta/openai.py b/src/pipecat/services/openai_realtime_beta/openai.py
index 689ca91a5..d603eda83 100644
--- a/src/pipecat/services/openai_realtime_beta/openai.py
+++ b/src/pipecat/services/openai_realtime_beta/openai.py
@@ -555,7 +555,10 @@ class OpenAIRealtimeBetaLLMService(LLMService):
                 await self._handle_evt_audio_transcript_delta(evt)
             elif evt.type == "error":
                 if not await self._maybe_handle_evt_retrieve_conversation_item_error(evt):
-                    if evt.error.code == "response_cancel_not_active":
+                    if evt.error.code in (
+                        "response_cancel_not_active",
+                        "conversation_already_has_active_response",
+                    ):
                         logger.debug(f"{self} {evt.error.message}")
                     else:
                         await self._handle_evt_error(evt)