diff --git a/app/models/event_callbacks.rb b/app/models/event_callbacks.rb
index 0d2bb5dd..d3138995 100644
--- a/app/models/event_callbacks.rb
+++ b/app/models/event_callbacks.rb
@@ -7,14 +7,16 @@ class EventCallbacks
   end
 
   def self.before_create(event)
-    event.secret = SecureRandom.urlsafe_base64(32)[0...32]
-    event.moderator_mail_id = SecureRandom.urlsafe_base64(32)[0...32]
-    event.submitter_mail_id = SecureRandom.urlsafe_base64(32)[0...32]
+    event.secret ||= SecureRandom.urlsafe_base64(32)[0...32]
+    event.moderator_mail_id ||= SecureRandom.urlsafe_base64(32)[0...32]
+    event.submitter_mail_id ||= SecureRandom.urlsafe_base64(32)[0...32]
   end
 
   def self.after_create(event)
-    EventMailer.create(event).deliver_now!
-    ModerationMailer.create(event).deliver_now!
+    if event.event.nil?
+      EventMailer.create(event).deliver_now!
+      ModerationMailer.create(event).deliver_now!
+    end
   end
 
   def self.before_update(event)