diff --git a/CLAUDE.md b/CLAUDE.md
index 8d741a4..c4d9d80 100644
--- a/CLAUDE.md
+++ b/CLAUDE.md
@@ -75,6 +75,7 @@ This file provides guidance to Claude Code (claude.ai/code) when working with co
 - **Styling:** Tailwind CSS v4
 - **Database:** PostgreSQL 16+
 - **ORM:** Drizzle ORM (TypeScript-first, performant)
+  - **Important:** Use `(table) => [...]` for indexes/constraints, NOT `(table) => ({...})`
 - **Queue System:** BullMQ (MIT License) - Async job processing
 - **In-Memory Store:** Redis 7 - Queue storage, sessions, caching
 - **Auth:** Cidaas (OIDC/OAuth2) - external platform
diff --git a/package.json b/package.json
index 74ab6d3..be4a792 100644
--- a/package.json
+++ b/package.json
@@ -15,7 +15,9 @@
     "db:migrate": "drizzle-kit migrate",
     "db:studio": "drizzle-kit studio",
     "db:push": "drizzle-kit push",
-    "db:seed": "tsx server/database/seed.ts"
+    "db:clean": "tsx server/database/clean.ts",
+    "db:seed": "tsx server/database/seed.ts",
+    "db:reset": "pnpm db:clean && pnpm db:seed"
   },
   "dependencies": {
     "@nuxtjs/i18n": "^10.1.2",
diff --git a/server/database/clean.ts b/server/database/clean.ts
new file mode 100644
index 0000000..1751e0a
--- /dev/null
+++ b/server/database/clean.ts
@@ -0,0 +1,75 @@
+/**
+ * Database Clean Script
+ *
+ * Removes all data from the database while preserving the schema.
+ * Useful for resetting to a clean state before seeding.
+ * Run with: pnpm db:clean
+ */
+
+import 'dotenv/config'
+import { drizzle } from 'drizzle-orm/postgres-js'
+import { sql } from 'drizzle-orm'
+import postgres from 'postgres'
+
+async function clean() {
+  // Get database connection from environment
+  const connectionString = process.env.DATABASE_URL
+  if (!connectionString) {
+    throw new Error('DATABASE_URL environment variable is not set')
+  }
+
+  console.log('🧹 Starting database cleanup...\n')
+
+  // Create database connection
+  const client = postgres(connectionString)
+  const db = drizzle(client)
+
+  try {
+    // Delete all data in reverse order of dependencies
+    console.log('Deleting product-role assignments...')
+    await db.execute(sql`DELETE FROM product_role_visibility`)
+
+    console.log('Deleting user-role assignments...')
+    await db.execute(sql`DELETE FROM user_roles`)
+
+    console.log('Deleting order items...')
+    await db.execute(sql`DELETE FROM order_items`)
+
+    console.log('Deleting orders...')
+    await db.execute(sql`DELETE FROM orders`)
+
+    console.log('Deleting cart items...')
+    await db.execute(sql`DELETE FROM cart_items`)
+
+    console.log('Deleting carts...')
+    await db.execute(sql`DELETE FROM carts`)
+
+    console.log('Deleting products...')
+    await db.execute(sql`DELETE FROM products`)
+
+    console.log('Deleting roles...')
+    await db.execute(sql`DELETE FROM roles`)
+
+    console.log('Deleting users...')
+    await db.execute(sql`DELETE FROM users`)
+
+    console.log('\n✅ Database cleaned successfully!')
+    console.log('💡 Run `pnpm db:seed` to populate with fresh data')
+  } catch (error) {
+    console.error('❌ Error cleaning database:', error)
+    throw error
+  } finally {
+    // Close database connection
+    await client.end()
+  }
+}
+
+// Run clean function
+clean()
+  .then(() => {
+    process.exit(0)
+  })
+  .catch((error) => {
+    console.error('Fatal error:', error)
+    process.exit(1)
+  })
diff --git a/server/database/schema.ts b/server/database/schema.ts
index 072e22f..9dd2e21 100644
--- a/server/database/schema.ts
+++ b/server/database/schema.ts
@@ -149,11 +149,11 @@ export const products = pgTable(
     createdAt: timestamp('created_at').defaultNow().notNull(),
     updatedAt: timestamp('updated_at').defaultNow().notNull(),
   },
-  (table) => ({
-    navProductIdIdx: index('products_nav_product_id_idx').on(table.navProductId),
-    activeIdx: index('products_active_idx').on(table.active),
-    categoryIdx: index('products_category_idx').on(table.category),
-  })
+  (table) => [
+    index('products_nav_product_id_idx').on(table.navProductId),
+    index('products_active_idx').on(table.active),
+    index('products_category_idx').on(table.category),
+  ]
 )
 
 /**
@@ -204,15 +204,12 @@ export const userRoles = pgTable(
     createdAt: timestamp('created_at').defaultNow().notNull(),
     updatedAt: timestamp('updated_at').defaultNow().notNull(),
   },
-  (table) => ({
+  (table) => [
     // Unique constraint: User can only have one entry per role
-    userIdRoleIdUnique: index('user_roles_user_id_role_id_unique').on(
-      table.userId,
-      table.roleId
-    ),
-    userIdIdx: index('user_roles_user_id_idx').on(table.userId),
-    statusIdx: index('user_roles_status_idx').on(table.status),
-  })
+    index('user_roles_user_id_role_id_unique').on(table.userId, table.roleId),
+    index('user_roles_user_id_idx').on(table.userId),
+    index('user_roles_status_idx').on(table.status),
+  ]
 )
 
 /**
@@ -233,14 +230,11 @@ export const productRoleVisibility = pgTable(
       .references(() => roles.id, { onDelete: 'cascade' }),
     createdAt: timestamp('created_at').defaultNow().notNull(),
   },
-  (table) => ({
+  (table) => [
     // Unique constraint: Product-Role pair can only exist once
-    productIdRoleIdUnique: index('product_role_visibility_product_id_role_id_unique').on(
-      table.productId,
-      table.roleId
-    ),
-    productIdIdx: index('product_role_visibility_product_id_idx').on(table.productId),
-  })
+    index('product_role_visibility_product_id_role_id_unique').on(table.productId, table.roleId),
+    index('product_role_visibility_product_id_idx').on(table.productId),
+  ]
 )
 
 /**
@@ -296,11 +290,11 @@ export const orders = pgTable(
     createdAt: timestamp('created_at').defaultNow().notNull(),
     updatedAt: timestamp('updated_at').defaultNow().notNull(),
   },
-  (table) => ({
-    orderNumberIdx: index('orders_order_number_idx').on(table.orderNumber),
-    userIdIdx: index('orders_user_id_idx').on(table.userId),
-    statusIdx: index('orders_status_idx').on(table.status),
-  })
+  (table) => [
+    index('orders_order_number_idx').on(table.orderNumber),
+    index('orders_user_id_idx').on(table.userId),
+    index('orders_status_idx').on(table.status),
+  ]
 )
 
 /**
diff --git a/server/database/seed.ts b/server/database/seed.ts
index adf3277..c605220 100644
--- a/server/database/seed.ts
+++ b/server/database/seed.ts
@@ -47,7 +47,16 @@ const standardRoles = [
 /**
  * Sample annual pass products for experimenta
  */
-const mockProducts = [
+const mockProducts: Array<{
+  navProductId: string
+  name: string
+  description: string
+  price: string
+  stockQuantity: number
+  category: string
+  active: boolean
+  roles: Array<'private' | 'educator' | 'company'>
+}> = [
   {
     navProductId: 'MSPACE-JK-2025',
     name: 'Makerspace Jahreskarte',
@@ -57,6 +66,7 @@ const mockProducts = [
     stockQuantity: 100,
     category: 'makerspace-annual-pass',
     active: true,
+    roles: ['private', 'educator', 'company'],
   },
   {
     navProductId: 'EXPERIMENTA-JK-2025',
@@ -67,6 +77,7 @@ const mockProducts = [
     stockQuantity: 200,
     category: 'annual-pass',
     active: true,
+    roles: ['private', 'educator', 'company'],
   },
   {
     navProductId: 'PAEDAGOGEN-JK-2025',
@@ -77,6 +88,7 @@ const mockProducts = [
     stockQuantity: 50,
     category: 'educator-annual-pass',
     active: true,
+    roles: ['educator'],
   },
 ]
 
@@ -151,24 +163,22 @@ async function seed() {
       console.log(`   - ${product.name} (${product.navProductId}) - €${product.price}`)
     })
 
-    // 3. Assign Roles to Products (Category-based mapping)
-    console.log(`\n🔗 Assigning roles to products based on category...`)
-
-    // Category to role mapping
-    const categoryRoleMapping: Record<string, string[]> = {
-      'makerspace-annual-pass': ['private', 'educator'],
-      'annual-pass': ['private'],
-      'educator-annual-pass': ['educator'],
-    }
+    // 3. Assign Roles to Products (using roles array from mock data)
+    console.log(`\n🔗 Assigning roles to products...`)
 
     let assignmentCount = 0
-    for (const product of insertedProducts) {
-      const roleCodes = categoryRoleMapping[product.category] || []
+    for (let i = 0; i < insertedProducts.length; i++) {
+      const product = insertedProducts[i]
+      const productData = mockProducts[i]
+      const roleCodes = productData.roles || []
 
       for (const roleCode of roleCodes) {
         // Find role by code
         const role = insertedRoles.find((r) => r.code === roleCode)
-        if (!role) continue
+        if (!role) {
+          console.warn(`   ⚠️  Role '${roleCode}' not found for product ${product.name}`)
+          continue
+        }
 
         // Check if assignment already exists
         const existing = await db.query.productRoleVisibility.findFirst({