diff --git a/create_tables.sql b/create_tables.sql
index 92fabeb..b82f4ba 100644
--- a/create_tables.sql
+++ b/create_tables.sql
@@ -62,9 +62,9 @@ CREATE TABLE given_answers (
 INSERT INTO instructors
   (first_name, last_name, personnel_id)
 VALUES
-  ('Jason', 'Streifling', '300484'),
-  ('Tim',   'Matzuga',    '300483'),
-  ('Georg', 'Bränzel',    '300485');
+  ( 'Jason', 'Streifling',     '123456' ),
+  ( 'Tim',   'Taler',          '123457' ),
+  ( 'Georg', 'aus dem Jungel', '123458' );
 
 INSERT INTO briefings (
   date, time, location, as_of, instructor_id
@@ -75,8 +75,8 @@ INSERT INTO briefings (
 INSERT INTO participants (
   first_name, last_name, company
 ) VALUES
-  ( 'Jan',   'Schiele', 'Körber'     ),
-  ( 'Murat', 'Zorlu',   'MP Technic' );
+  ( 'Peter', 'Enis',  'Körber'     ),
+  ( 'Dürüm', 'Döner', 'MP Technic' );
 
 INSERT INTO questions (
   question, answer_1, answer_2, answer_3, answer_4, correct_answer