rails-red conflicts with discard gem

[alec-c4]

Hey!
I have model SalesPerson

class SalesPerson < ApplicationRecord
  include IdentityCache
  include Discard::Model

  validates :referral_code, uniqueness: true, presence: true
  validates :name, presence: true

  default_scope -> { kept }
end 

which is working with discard gem. Every time i try to generate erd file i see following error

Running via Spring preloader in process 76935
Loading application environment...
Loading code in search of Active Record models...
rake aborted!
Loading models failed!
Error occurred while loading application: uninitialized constant SalesPerson::Discard (NameError)
    app/models/sales_person.rb:3:in `<class:SalesPerson>'
    app/models/sales_person.rb:1:in `<main>'
<internal:/Users/alec/.rbenv/versions/3.0.2/lib/ruby/3.0.0/rubygems/core_ext/kernel_require.rb>:85:in `require'
<internal:/Users/alec/.rbenv/versions/3.0.2/lib/ruby/3.0.0/rubygems/core_ext/kernel_require.rb>:85:in `require'
-e:1:in `<main>'

Caused by:
NameError: uninitialized constant SalesPerson::Discard

How to fix it?

[mjobin-mdsol]

are you sure its related to rails-erd ? does not appear like so ...