diff --git a/backend/maintenance/api_maint_test.go b/backend/maintenance/api_maint_test.go
index 59f36d8..02c4b0c 100644
--- a/backend/maintenance/api_maint_test.go
+++ b/backend/maintenance/api_maint_test.go
@@ -139,55 +139,3 @@ func TestGetMDSkills(t *testing.T) {
 	//assert.Equal(t, false, listOfCharacter.Public)
 
 }
-
-/*
-func TestUpdateMDSkill(t *testing.T) {
-	database.SetupTestDB(false)
-	// Initialize a Gin router
-	r := gin.Default()
-	router.SetupGin(r)
-
-	// Routes
-	protected := router.BaseRouterGrp(r)
-	character.RegisterRoutes(protected)
-	gsmaster.RegisterRoutes(protected)
-	protected.GET("/test", func(c *gin.Context) {
-		c.JSON(http.StatusOK, gin.H{"status": "Test OK"})
-	})
-	u := user.User{}
-	u.FirstId(1)
-
-	// Define the test case input
-	sk := models.Skill{}
-	sk.Name = "Geländekunde"
-	sk.ID = 64
-	jsonData, err := json.Marshal(sk)
-	if err != nil {
-		t.Fatalf("Failed to marshal skill: %v", err)
-	}
-
-	// Create a test HTTP request
-	req, _ := http.NewRequest("PUT", "/api/maintenance/skills/64", bytes.NewBuffer(jsonData))
-	req.Header.Set("Content-Type", "application/json")
-	token := user.GenerateToken(&u)
-	req.Header.Set("Authorization", "Bearer "+token)
-
-	// Create a response recorder to capture the handler's response
-	respRecorder := httptest.NewRecorder()
-
-	// Perform the test request
-	r.ServeHTTP(respRecorder, req)
-
-	// Assert the response status code
-	assert.Equal(t, http.StatusCreated, respRecorder.Code)
-
-	// Assert the response body
-	var createdCharacter models.Char
-	err = json.Unmarshal(respRecorder.Body.Bytes(), &createdCharacter)
-	assert.NoError(t, err)
-	assert.Equal(t, "Aragorn", createdCharacter.Name)
-	assert.Equal(t, "Human", createdCharacter.Rasse)
-	assert.Equal(t, 1, createdCharacter.ID) // Check the simulated ID
-}
-
-*/
diff --git a/backend/maintenance/copy_db_test.go b/backend/maintenance/copy_db_test.go
index 60a759f..011bcd7 100644
--- a/backend/maintenance/copy_db_test.go
+++ b/backend/maintenance/copy_db_test.go
@@ -1,6 +1,7 @@
 package maintenance
 
 import (
+	"bamort/database"
 	"bamort/models"
 	"bamort/user"
 	"fmt"
@@ -15,7 +16,7 @@ import (
 )
 
 // TestCopyLiveDatabaseToFile_Success tests the main functionality of copyLiveDatabaseToFile
-func TestCopyLiveDatabaseToFile_Success(t *testing.T) {
+func TestCopyDatabaseToFile_Success(t *testing.T) {
 	// Setup
 	tempDir := t.TempDir()
 	targetFile := filepath.Join(tempDir, "test_backup.db")
@@ -94,7 +95,7 @@ func TestCopyLiveDatabaseToFile_Success(t *testing.T) {
 }
 
 // TestCopyLiveDatabaseToFile_BackupExisting tests file backup functionality
-func TestCopyLiveDatabaseToFile_BackupExisting(t *testing.T) {
+func TestCopyDatabaseToFile_BackupExisting(t *testing.T) {
 	// Setup
 	tempDir := t.TempDir()
 	targetFile := filepath.Join(tempDir, "test_backup.db")
@@ -143,7 +144,7 @@ func TestCopyLiveDatabaseToFile_BackupExisting(t *testing.T) {
 }
 
 // TestCopyLiveDatabaseToFile_EmptyDatabase tests with empty database
-func TestCopyLiveDatabaseToFile_EmptyDatabase(t *testing.T) {
+func TestCopyDatabaseToFile_EmptyDatabase(t *testing.T) {
 	// Setup
 	tempDir := t.TempDir()
 	targetFile := filepath.Join(tempDir, "empty_backup.db")
@@ -184,6 +185,44 @@ func TestCopyLiveDatabaseToFile_EmptyDatabase(t *testing.T) {
 	assert.Equal(t, int64(0), userCount, "User table should be empty")
 }
 
+func TestCopyLiveDatabaseToFile(t *testing.T) {
+	// Setup
+	tempDir := t.TempDir()
+	targetFile := filepath.Join(tempDir, "empty_backup.db")
+
+	// Create empty live database (only migrate structures, no data)
+	database.ConnectDatabase()
+	liveDB := database.DB
+	require.NotNil(t, liveDB, "Live database should be connected")
+	defer func() {
+		if sqlDB, err := liveDB.DB(); err == nil {
+			sqlDB.Close()
+		}
+	}()
+
+	// Execute
+	err := CopyLiveDatabaseToFile(liveDB, targetFile)
+
+	// Verify
+	require.NoError(t, err, "CopyLiveDatabaseToFile should succeed with empty database")
+	assert.FileExists(t, targetFile, "Target file should be created")
+
+	// Verify target database has structures but no data
+	targetDB, err := gorm.Open(sqlite.Open(targetFile), &gorm.Config{})
+	require.NoError(t, err, "Should be able to open target database")
+	defer func() {
+		if sqlDB, err := targetDB.DB(); err == nil {
+			sqlDB.Close()
+		}
+	}()
+
+	// Check that tables exist but are empty
+	var userCount int64
+	err = targetDB.Model(&user.User{}).Count(&userCount).Error
+	require.NoError(t, err, "Should be able to count users")
+	assert.Equal(t, int64(2), userCount, "User table should be empty")
+}
+
 // BenchmarkCopyLiveDatabaseToFile benchmarks the copy function performance
 func BenchmarkCopyLiveDatabaseToFile(b *testing.B) {
 	// Setup test database once
diff --git a/backend/maintenance/handlers.go b/backend/maintenance/handlers.go
index a18a00a..ae38dec 100644
--- a/backend/maintenance/handlers.go
+++ b/backend/maintenance/handlers.go
@@ -13,6 +13,7 @@ import (
 	"github.com/gin-gonic/gin"
 	"gorm.io/driver/sqlite"
 	"gorm.io/gorm"
+	"gorm.io/gorm/clause"
 )
 
 // Constants for test data management
@@ -221,8 +222,11 @@ func copyTableData(sourceDB, targetDB *gorm.DB, model interface{}) error {
 			break
 		}
 
-		// Batch in SQLite einfügen
-		if err := targetDB.Model(model).Create(&records).Error; err != nil {
+		// Batch in SQLite einfügen mit Konflikt-Behandlung
+		// Verwende Clauses.OnConflict um bestehende Datensätze zu ersetzen
+		if err := targetDB.Model(model).Clauses(clause.OnConflict{
+			UpdateAll: true,
+		}).Create(&records).Error; err != nil {
 			return err
 		}
 	}
diff --git a/backend/models/database.go b/backend/models/database.go
index cd7f81e..776b0d5 100644
--- a/backend/models/database.go
+++ b/backend/models/database.go
@@ -35,6 +35,10 @@ func MigrateStructure(db ...*gorm.DB) error {
 	if err != nil {
 		return err
 	}
+	err = learningMigrateStructure(targetDB)
+	if err != nil {
+		return err
+	}
 
 	return nil
 }
@@ -130,3 +134,30 @@ func skillsMigrateStructure(db ...*gorm.DB) error {
 	}
 	return nil
 }
+
+func learningMigrateStructure(db ...*gorm.DB) error {
+	// Use provided DB or default to database.DB
+	var targetDB *gorm.DB
+	if len(db) > 0 && db[0] != nil {
+		targetDB = db[0]
+	} else {
+		targetDB = database.DB
+	}
+
+	err := targetDB.AutoMigrate(
+		&Source{},
+		&CharacterClass{},
+		&SkillCategory{},
+		&SkillDifficulty{},
+		&SpellSchool{},
+		&ClassCategoryEPCost{},
+		&ClassSpellSchoolEPCost{},
+		&SpellLevelLECost{},
+		&SkillCategoryDifficulty{},
+		&SkillImprovementCost{},
+	)
+	if err != nil {
+		return err
+	}
+	return nil
+}