diff --git a/backend/sql/add_vocab_lesson_didactics.sql b/backend/sql/add_vocab_lesson_didactics.sql
index 058e96e..86c2c84 100644
--- a/backend/sql/add_vocab_lesson_didactics.sql
+++ b/backend/sql/add_vocab_lesson_didactics.sql
@@ -5,10 +5,10 @@ ADD COLUMN IF NOT EXISTS grammar_focus JSONB,
 ADD COLUMN IF NOT EXISTS speaking_prompts JSONB,
 ADD COLUMN IF NOT EXISTS practical_tasks JSONB;
 
-INSERT INTO community.vocab_grammar_exercise_type (name, description) VALUES
-  ('dialog_completion', 'Dialogergänzung'),
-  ('situational_response', 'Situative Antwort'),
-  ('pattern_drill', 'Muster-Drill'),
-  ('reading_aloud', 'Lautlese-Übung'),
-  ('speaking_from_memory', 'Freies Sprechen')
+INSERT INTO community.vocab_grammar_exercise_type (name, description, created_at) VALUES
+  ('dialog_completion', 'Dialogergänzung', NOW()),
+  ('situational_response', 'Situative Antwort', NOW()),
+  ('pattern_drill', 'Muster-Drill', NOW()),
+  ('reading_aloud', 'Lautlese-Übung', NOW()),
+  ('speaking_from_memory', 'Freies Sprechen', NOW())
 ON CONFLICT (name) DO NOTHING;
diff --git a/backend/sql/create-vocab-courses.sql b/backend/sql/create-vocab-courses.sql
index 3cb3efc..471986c 100644
--- a/backend/sql/create-vocab-courses.sql
+++ b/backend/sql/create-vocab-courses.sql
@@ -218,18 +218,18 @@ CREATE INDEX IF NOT EXISTS vocab_grammar_exercise_progress_exercise_idx
 -- ============================================
 
 -- Standard-Übungstypen für Grammatik
-INSERT INTO community.vocab_grammar_exercise_type (name, description) VALUES
-    ('gap_fill', 'Lückentext-Übung'),
-    ('multiple_choice', 'Multiple-Choice-Fragen'),
-    ('sentence_building', 'Satzbau-Übung'),
-    ('transformation', 'Satzumformung'),
-    ('conjugation', 'Konjugations-Übung'),
-    ('declension', 'Deklinations-Übung'),
-    ('dialog_completion', 'Dialogergänzung'),
-    ('situational_response', 'Situative Antwort'),
-    ('pattern_drill', 'Muster-Drill'),
-    ('reading_aloud', 'Lautlese-Übung'),
-    ('speaking_from_memory', 'Freies Sprechen')
+INSERT INTO community.vocab_grammar_exercise_type (name, description, created_at) VALUES
+    ('gap_fill', 'Lückentext-Übung', NOW()),
+    ('multiple_choice', 'Multiple-Choice-Fragen', NOW()),
+    ('sentence_building', 'Satzbau-Übung', NOW()),
+    ('transformation', 'Satzumformung', NOW()),
+    ('conjugation', 'Konjugations-Übung', NOW()),
+    ('declension', 'Deklinations-Übung', NOW()),
+    ('dialog_completion', 'Dialogergänzung', NOW()),
+    ('situational_response', 'Situative Antwort', NOW()),
+    ('pattern_drill', 'Muster-Drill', NOW()),
+    ('reading_aloud', 'Lautlese-Übung', NOW()),
+    ('speaking_from_memory', 'Freies Sprechen', NOW())
 ON CONFLICT (name) DO NOTHING;
 
 -- ============================================
diff --git a/backend/sql/update-vocab-courses-existing.sql b/backend/sql/update-vocab-courses-existing.sql
index e6073a8..b98e53e 100644
--- a/backend/sql/update-vocab-courses-existing.sql
+++ b/backend/sql/update-vocab-courses-existing.sql
@@ -110,18 +110,18 @@ CREATE INDEX IF NOT EXISTS vocab_grammar_exercise_progress_exercise_idx
 -- ============================================
 -- 5. Standard-Daten einfügen
 -- ============================================
-INSERT INTO community.vocab_grammar_exercise_type (name, description) VALUES
-    ('gap_fill', 'Lückentext-Übung'),
-    ('multiple_choice', 'Multiple-Choice-Fragen'),
-    ('sentence_building', 'Satzbau-Übung'),
-    ('transformation', 'Satzumformung'),
-    ('conjugation', 'Konjugations-Übung'),
-    ('declension', 'Deklinations-Übung'),
-    ('dialog_completion', 'Dialogergänzung'),
-    ('situational_response', 'Situative Antwort'),
-    ('pattern_drill', 'Muster-Drill'),
-    ('reading_aloud', 'Lautlese-Übung'),
-    ('speaking_from_memory', 'Freies Sprechen')
+INSERT INTO community.vocab_grammar_exercise_type (name, description, created_at) VALUES
+    ('gap_fill', 'Lückentext-Übung', NOW()),
+    ('multiple_choice', 'Multiple-Choice-Fragen', NOW()),
+    ('sentence_building', 'Satzbau-Übung', NOW()),
+    ('transformation', 'Satzumformung', NOW()),
+    ('conjugation', 'Konjugations-Übung', NOW()),
+    ('declension', 'Deklinations-Übung', NOW()),
+    ('dialog_completion', 'Dialogergänzung', NOW()),
+    ('situational_response', 'Situative Antwort', NOW()),
+    ('pattern_drill', 'Muster-Drill', NOW()),
+    ('reading_aloud', 'Lautlese-Übung', NOW()),
+    ('speaking_from_memory', 'Freies Sprechen', NOW())
 ON CONFLICT (name) DO NOTHING;
 
 -- ============================================