ActiveRecord::ReadOnlyRecord when using ActiveAdmin and Friendly_id

I started using ActiveAdmin recently in a project and almost everything works great but I'm having a problem when using it in combination with the friendly_id gem. I'm getting ActiveRecord::ReadOnlyRecord thrown for my forms [i believe] because of the friendly_id attribute whose ID is readonly:

{"utf8"=>"✓",
"_method"=>"put",
"authenticity_token"=>"Rc5PmUYZt3BiLvfPQr8iCPPXlbfgjoe/n+NhCwXazNs=",
"space"=>{"name"=>"The Kosmonaut",
"address"=>"8 Sichovykh Striltsiv 24",
"email"=>"info@somedomain.com"},
"commit"=>"Update Space",
"id"=>"the-kosmonaut"}  <--- culprit

I'm guessing the last line is the culprit as it's a readonly attribute, it's not in my form but rather in the PATH

http://localhost:5000/manage/spaces/the-kosmonaut/edit

How can I fix this from trying to update the ID?

Form from in ActiveAdmin looks like this:

  form do |f|
    f.inputs "Details" do
      f.input :name
      f.input :address
      f.input :email
      f.input :phone
      f.input :website
    end
    f.inputs "Content" do
      f.input :description
      f.input :blurb
    end
    f.buttons
  end

UPDATE: This doesn't work either so it's not the friendly_id?

I tried using @watson's suggestion which should have worked but still got the same error ;-(

{"utf8"=>"✓",
 "_method"=>"put",
 "authenticity_token"=>"Rc5PmUYZt3BiLvfPQr8iCPPXlbfgjoe/n+NhCwXazNs=",
 "space"=>{"name"=>"The Kosmonaut 23"},
 "commit"=>"Update Space",
 "id"=>"6933"}

http://localhost:5000/manage/spaces/6933/edit

When I check the record in the console with record.readonly? it returns false

UPDATE UPDATE: removing the scope_to fixes the problem.

scope_to :current_user, :unless =>