diff --git a/doc/en/changelog.rst b/doc/en/changelog.rst
index 383479e07..5dfba97ce 100644
--- a/doc/en/changelog.rst
+++ b/doc/en/changelog.rst
@@ -34,7 +34,6 @@ pytest 6.2.5 (2021-08-29)
 Bug Fixes
 ---------
 
-- `#9175 <https://github.com/pytest-dev/pytest/issues/9175>`_: Fix duplicate parametrizes in the same module.
 - `#7792 <https://github.com/pytest-dev/pytest/issues/7792>`_: Fix missing marks when inheritance from multiple classes.
 
 
diff --git a/src/_pytest/mark/structures.py b/src/_pytest/mark/structures.py
index 1abda3596..16909d78d 100644
--- a/src/_pytest/mark/structures.py
+++ b/src/_pytest/mark/structures.py
@@ -24,7 +24,6 @@ import attr
 
 from .._code import getfslineno
 from ..compat import ascii_escaped
-from ..compat import cached_property
 from ..compat import final
 from ..compat import NOTSET
 from ..compat import NotSetType
@@ -260,11 +259,6 @@ class Mark:
             _ispytest=True,
         )
 
-    @cached_property
-    def unique_name(self):
-        # For "parametrize" mark, the name value is "parametrize" and not the name that the user was wrote
-        return str(self.args[0] if self.name == "parametrize" else self.name)
-
 
 # A generic parameter designating an object to which a Mark may
 # be applied -- a test function (callable) or class.
@@ -378,12 +372,12 @@ def get_mro_marks(cls: type):
     if cls is object or cls is None or hasattr(cls, "mro_markers"):
         return getattr(cls, "mro_markers", {})
 
-    mro_markers = {mark.unique_name: mark for mark in get_unpacked_marks(cls)}
+    mro_markers = {str(mark): mark for mark in get_unpacked_marks(cls)}
     for parent_obj in cls.__mro__[1:]:
         if parent_obj is not object:
-            for unique_name, mark in get_mro_marks(parent_obj).items():
-                if unique_name not in mro_markers:
-                    mro_markers[unique_name] = mark
+            for name, mark in get_mro_marks(parent_obj).items():
+                if name not in mro_markers:
+                    mro_markers[name] = mark
 
     # To not extract the marks for each item's classes, I store the variable in "cls" as variable cached.
     setattr(cls, "mro_markers", mro_markers)
diff --git a/src/_pytest/nodes.py b/src/_pytest/nodes.py
index ac0468ec1..6cffff1eb 100644
--- a/src/_pytest/nodes.py
+++ b/src/_pytest/nodes.py
@@ -382,9 +382,9 @@ class Node(metaclass=NodeMeta):
         for node in reversed(self.listchain()):
             for mark in node.own_markers:
                 if name is None or getattr(mark, "name", None) == name:
-                    mark_to_name = str(mark)
-                    if mark_to_name not in duplicate_marks:
-                        duplicate_marks[mark_to_name] = mark
+                    mark_to_str = str(mark)
+                    if mark_to_str not in duplicate_marks:
+                        duplicate_marks[mark_to_str] = mark
                         yield node, mark
 
     @overload
diff --git a/src/_pytest/python.py b/src/_pytest/python.py
index 7491df35a..0070e1f4b 100644
--- a/src/_pytest/python.py
+++ b/src/_pytest/python.py
@@ -1620,12 +1620,7 @@ class Function(PyobjMixin, nodes.Item):
         self.keywords.update(self.obj.__dict__)
         self.own_markers.extend(get_unpacked_marks(self.obj))
         if self.cls:
-            self.own_markers = list(
-                dict(
-                    get_mro_marks(self.cls),
-                    **{mark.unique_name: mark for mark in self.own_markers},
-                ).values()
-            )
+            self.own_markers.extend(list(get_mro_marks(self.cls).values()))
         if callspec:
             self.callspec = callspec
             # this is total hostile and a mess
diff --git a/testing/test_mark.py b/testing/test_mark.py
index 9aab5596a..428470434 100644
--- a/testing/test_mark.py
+++ b/testing/test_mark.py
@@ -1151,34 +1151,3 @@ def test_markers_from_multiple_inheritances(pytester: Pytester) -> None:
     )
     result = pytester.inline_run()
     result.assertoutcome(passed=1)
-
-
-def test_duplicate_fixtures_in_same_class(pytester: Pytester) -> None:
-    # https://github.com/pytest-dev/pytest/issues/9175
-    pytester.makepyfile(
-        """
-        from typing import Any
-
-        import pytest
-
-
-        @pytest.fixture
-        def some_fixture(request) -> Any:
-            return request.param
-
-
-        # I apply to all test methods
-        @pytest.mark.parametrize("some_fixture", [{"b": "b"}], indirect=True)
-        class TestMultiParameterization:
-            # I apply to just this one test method
-            @pytest.mark.parametrize("some_fixture", [{"a": "a"}], indirect=True)
-            def test_local_some_fixture(self, some_fixture: Any) -> None:
-                assert "a" in some_fixture
-
-            def test_global_some_fixture(self, some_fixture: Any) -> None:
-                assert "b" in some_fixture
-
-        """
-    )
-    result = pytester.inline_run()
-    result.assertoutcome(passed=2)