diff --git a/openstackclient/compute/v2/server.py b/openstackclient/compute/v2/server.py
index 3fb9bf098..fff67ff7c 100644
--- a/openstackclient/compute/v2/server.py
+++ b/openstackclient/compute/v2/server.py
@@ -2586,9 +2586,9 @@ def take_action(self, parsed_args):
                     columns += ('Metadata',)
                     column_headers += ('Properties',)
 
-            # convert back to tuple
-            column_headers = tuple(column_headers)
-            columns = tuple(columns)
+            # remove duplicates
+            column_headers = tuple(dict.fromkeys(column_headers))
+            columns = tuple(dict.fromkeys(columns))
 
         if parsed_args.marker is not None:
             # Check if both "--marker" and "--deleted" are used.
diff --git a/openstackclient/tests/unit/compute/v2/test_server.py b/openstackclient/tests/unit/compute/v2/test_server.py
index d7e84ba38..16ec9e127 100644
--- a/openstackclient/tests/unit/compute/v2/test_server.py
+++ b/openstackclient/tests/unit/compute/v2/test_server.py
@@ -4706,6 +4706,7 @@ def test_server_list_column_option(self):
         self.assertIn('Availability Zone', columns)
         self.assertIn('Host', columns)
         self.assertIn('Properties', columns)
+        self.assertCountEqual(columns, set(columns))
 
     def test_server_list_no_name_lookup_option(self):
         self.data = tuple(