Fixes #4089 - Shared draft attribute in object manage not disabled for onclick.

db/migrate/20220524074118_issue4089_fix_draft_attribute.rb

@@ -0,0 +1,10 @@
+# Copyright (C) 2012-2022 Zammad Foundation, https://zammad-foundation.org/
+
+class Issue4089FixDraftAttribute < ActiveRecord::Migration[5.0]
+  def change
+    # return if it's a new setup
+    return if !Setting.exists?(name: 'system_init_done')
+
+    ObjectManager::Attribute.find_by(name: 'shared_drafts', object_lookup_id: ObjectLookup.by_name('Group')).update(editable: false)
+  end
+end

db/seeds/object_manager_attributes.rb

@@ -1824,7 +1824,7 @@ ObjectManager::Attribute.add(
     default:    true,
     permission: ['admin.group'],
   },
-  editable:    true,
+  editable:    false,
   active:      true,
   screens:     {
     create: {