diff --git a/db/migrate/20120701154453_create_invitations.rb b/db/migrate/20120701154453_create_invitations.rb
index 8ad03ce5..a41033af 100644
--- a/db/migrate/20120701154453_create_invitations.rb
+++ b/db/migrate/20120701154453_create_invitations.rb
@@ -1,3 +1,9 @@
+# If you are reading this file because Rails complains that there isn't a
+# version on this migration, stop.
+#
+# Create your database with `rails db:schema:load`, not by running all these.
+# We have migrations to migrate live databases, not create them, and we do not
+# want a PR to 'fix' migrations.
 class CreateInvitations < ActiveRecord::Migration
   def change
     create_table :invitations do |t|