Association with scope in Ruby on Rails

I have a Ruby on Rails application in which I have licenses, items that can be licensed and a table that lists the two (Which items in what quantity are present in the license?). Analogously to the items in a shopping cart.

Some of the items will no longer be marketed, but I intend to keep them in the database. I then created a soft-delete and used a default scope for the template and for the relationships. But when I try to change existing records using the related template, I get an exception: ActiveRecord :: ReadOnlyRecord

My templates look like this:

class Item <ActiveRecord :: Base
  default_scope {where (deleted: false)}
end

class LicenseItem <ActiveRecord :: Base
  belongs_to: license, touch: true
  belongs_to: item
end

class License <ActiveRecord :: Base
  has_many: license_items,
          -> {joins (: item) .where (items: {deleted: false})},
          dependent:: destroy
end

In this way:

pry (main)> License.find (0) .license_items [0] .readonly?
=> true

Is there any way to make this relationship not just reading?

I have already tried to add readonly (false) at the end of the has_many scope toLicense without success.