diff --git a/dolphinscheduler-python/pydolphinscheduler/src/pydolphinscheduler/core/task.py b/dolphinscheduler-python/pydolphinscheduler/src/pydolphinscheduler/core/task.py
index 9bc8d459e988c03a8f525ad47aa25bdf5a555ae8..599b9793698265326d7d2930698f9c9081c8a980 100644
--- a/dolphinscheduler-python/pydolphinscheduler/src/pydolphinscheduler/core/task.py
+++ b/dolphinscheduler-python/pydolphinscheduler/src/pydolphinscheduler/core/task.py
@@ -17,7 +17,7 @@
 
 """DolphinScheduler Task and TaskRelation object."""
 
-import logging
+from logging import getLogger
 from typing import Dict, List, Optional, Sequence, Set, Tuple, Union
 
 from pydolphinscheduler.constants import (
@@ -34,6 +34,8 @@ from pydolphinscheduler.core.process_definition import (
 )
 from pydolphinscheduler.java_gateway import launch_gateway
 
+logger = getLogger(__name__)
+
 
 class TaskRelation(Base):
     """TaskRelation object, describe the relation of exactly two tasks."""
@@ -146,7 +148,7 @@ class Task(Base):
         ):
             self.process_definition.add_task(self)
         else:
-            logging.warning(
+            logger.warning(
                 "Task code %d already in process definition, prohibit re-add task.",
                 self.code,
             )
diff --git a/dolphinscheduler-python/pydolphinscheduler/tests/core/test_task.py b/dolphinscheduler-python/pydolphinscheduler/tests/core/test_task.py
index 6af731b5ff7179e45706e4d4005f9075739f3bfa..7d4bbebdd33a2067281f0478d7ad776c571c25c4 100644
--- a/dolphinscheduler-python/pydolphinscheduler/tests/core/test_task.py
+++ b/dolphinscheduler-python/pydolphinscheduler/tests/core/test_task.py
@@ -16,13 +16,16 @@
 # under the License.
 
 """Test Task class function."""
-
+import logging
+import re
 from unittest.mock import patch
 
 import pytest
 
+from pydolphinscheduler.core.process_definition import ProcessDefinition
 from pydolphinscheduler.core.task import Task, TaskRelation
 from tests.testing.task import Task as testTask
+from tests.testing.task import TaskWithCode
 
 TEST_TASK_RELATION_SET = set()
 TEST_TASK_RELATION_SIZE = 0
@@ -222,3 +225,19 @@ def test_tasks_list_shift(dep_expr: str, flag: str):
 
     assert all([1 == len(getattr(t, reverse_direction_attr)) for t in tasks])
     assert all([task.code in getattr(t, reverse_direction_attr) for t in tasks])
+
+
+def test_add_duplicate(caplog):
+    """Test add task which code already in process definition."""
+    with ProcessDefinition("test_add_duplicate_workflow") as _:
+        TaskWithCode(name="test_task_1", task_type="test", code=123, version=1)
+        with caplog.at_level(logging.WARNING):
+            TaskWithCode(
+                name="test_task_duplicate_code", task_type="test", code=123, version=2
+            )
+        assert all(
+            [
+                caplog.text.startswith("WARNING  pydolphinscheduler"),
+                re.findall("already in process definition", caplog.text),
+            ]
+        )
diff --git a/dolphinscheduler-python/pydolphinscheduler/tests/testing/task.py b/dolphinscheduler-python/pydolphinscheduler/tests/testing/task.py
index e0affc9f851f39d3d4dfa6dc5f8457cf5e471edd..11ffbf1e6f390fb0576e4eb2413a7a722531144e 100644
--- a/dolphinscheduler-python/pydolphinscheduler/tests/testing/task.py
+++ b/dolphinscheduler-python/pydolphinscheduler/tests/testing/task.py
@@ -30,3 +30,18 @@ class Task(SourceTask):
     def gen_code_and_version(self):
         """Mock java gateway code and version, convenience method for unittest."""
         return uuid.uuid1().time, self.DEFAULT_VERSION
+
+
+class TaskWithCode(SourceTask):
+    """Mock class :class:`pydolphinscheduler.core.task.Task` and it return some code and version."""
+
+    def __init__(
+        self, name: str, task_type: str, code: int, version: int, *args, **kwargs
+    ):
+        self._constant_code = code
+        self._constant_version = version
+        super().__init__(name, task_type, *args, **kwargs)
+
+    def gen_code_and_version(self):
+        """Mock java gateway code and version, convenience method for unittest."""
+        return self._constant_code, self._constant_version