```ruby
module DefenceRequestTransitions
  class Acknowledge
    def initialize(transition_params)
      @defence_request = transition_params.fetch(:defence_request)
      @user = transition_params.fetch(:user)
    end

    def complete
      set_cco && acknowledge_defence_request
    end

    private

    attr_reader :defence_request, :user

    def set_cco
      return true if defence_request.cco_uid = user.uid
    end

    def acknowledge_defence_request
      run_transition && defence_request.save! && defence_request.generate_dscc_number!
    end

    def run_transition
      defence_request.can_acknowledge? && defence_request.acknowledge
    end
  end
end
```

Add warning note about dscc number generation
user
```ruby
module DefenceRequestTransitions
  class Acknowledge
    def initialize(transition_params)
      @defence_request = transition_params.fetch(:defence_request)
      @user = transition_params.fetch(:user)
    end

    def complete
      set_cco && acknowledge_defence_request
    end

    private

    attr_reader :defence_request, :user

    def set_cco
      return true if defence_request.cco_uid = user.uid
    end

    # Note: In the unlikely event that we cannot generate a dscc_number the dr
    # is going to end up in a broken state. We will move this into a delayed
    # job where we will handle this case.
    def acknowledge_defence_request
      run_transition && defence_request.save! && defence_request.generate_dscc_number!
    end

    def run_transition
      defence_request.can_acknowledge? && defence_request.acknowledge
    end
  end
end
```
assistant