diff --git a/autogen/agentchat/conversable_agent.py b/autogen/agentchat/conversable_agent.py
index 0d968f2ac6b..19f2a4c2a0d 100644
--- a/autogen/agentchat/conversable_agent.py
+++ b/autogen/agentchat/conversable_agent.py
@@ -197,6 +197,21 @@ def __init__(
             self._code_execution_config = code_execution_config
 
             if self._code_execution_config.get("executor") is not None:
+                if "use_docker" in self._code_execution_config:
+                    raise ValueError(
+                        "'use_docker' in code_execution_config is not valid when 'executor' is set. Use the appropriate arg in the chosen executor instead."
+                    )
+
+                if "work_dir" in self._code_execution_config:
+                    raise ValueError(
+                        "'work_dir' in code_execution_config is not valid when 'executor' is set. Use the appropriate arg in the chosen executor instead."
+                    )
+
+                if "timeout" in self._code_execution_config:
+                    raise ValueError(
+                        "'timeout' in code_execution_config is not valid when 'executor' is set. Use the appropriate arg in the chosen executor instead."
+                    )
+
                 # Use the new code executor.
                 self._code_executor = CodeExecutorFactory.create(self._code_execution_config)
                 self.register_reply([Agent, None], ConversableAgent._generate_code_execution_reply_using_executor)