Force job costumer.firstname and lastname from costumer reference

app/models/job.rb

@@ -15,7 +15,7 @@ class Job < ApplicationRecord
   before_save :update_status_changed_at, if: :will_save_change_to_status?
   before_save :set_cost_qm
   before_save :calc_cost, if: :printed_pages_changes?
-  before_validation :set_costumer_infos
+  before_validation :set_costumer_infos, unless: :created_by_operator?, on: :create
 
   # TODO: works only when job is created. Should move analyzer to activestorage :
   # https://discuss.rubyonrails.org/t/active-storage-in-production-lessons-learned-and-in-depth-look-at-how-it-works/83289
@@ -165,7 +165,7 @@ class Job < ApplicationRecord
   end
 
   def set_costumer_infos
-    self.costumer_firstname = costumer.firstname if self.costumer_firstname.nil?
-    self.costumer_lastname = costumer.lastname if self.costumer_lastname.nil?
+    self.costumer_firstname = costumer.firstname
+    self.costumer_lastname = costumer.lastname
   end
 end