diff --git a/app/controllers/v3/spaces_controller.rb b/app/controllers/v3/spaces_controller.rb
index ee7304d852a..b6a063f92fe 100644
--- a/app/controllers/v3/spaces_controller.rb
+++ b/app/controllers/v3/spaces_controller.rb
@@ -228,7 +228,7 @@ def fetch_isolation_segment(guid)
   def fetch_running_security_group_guids(space)
     space_level_groups = SecurityGroup.where(spaces: space)
     global_groups = SecurityGroup.where(running_default: true)
-    space_level_groups.union(global_groups).distinct.map(&:guid)
+    space_level_groups.union(global_groups).map(&:guid)
   end
 
   def fetch_staging_security_group_guids(space)