diff --git a/backend/src/services/skillSeeder.ts b/backend/src/services/skillSeeder.ts
index 68d6e7c..5597d46 100644
--- a/backend/src/services/skillSeeder.ts
+++ b/backend/src/services/skillSeeder.ts
@@ -93,6 +93,20 @@ export function ensureSkillsSeeded() {
       }
     }
 
+    // Explicitly remove deprecated skills that should no longer appear
+    try {
+      const deprecatedIds = [
+        'certifications.security_clearance.nato',
+        'certifications.security_clearance.vs'
+      ]
+      const delEmp = db.prepare('DELETE FROM employee_skills WHERE skill_id = ?')
+      const delSkill = db.prepare('DELETE FROM skills WHERE id = ?')
+      for (const depId of deprecatedIds) {
+        delEmp.run(depId)
+        delSkill.run(depId)
+      }
+    } catch {}
+
     logger.info(`SkillSeeder: ensured ${cats} categories, ${subs} subcategories, ${skills} skills (idempotent).`)
   } catch (err) {
     logger.warn('SkillSeeder failed (non-fatal): ' + (err as Error).message)
diff --git a/shared/skills.js b/shared/skills.js
index ba269fe..6e62ff5 100644
--- a/shared/skills.js
+++ b/shared/skills.js
@@ -139,10 +139,9 @@ const SKILL_HIERARCHY = [
         id: 'security_clearance',
         name: 'Sicherheitsüberprüfungen',
         skills: [
+          { id: 'ue1', name: 'Sicherheitsüberprüfung Ü1' },
           { id: 'ue2', name: 'Sicherheitsüberprüfung Ü2' },
-          { id: 'ue3', name: 'Sicherheitsüberprüfung Ü3' },
-          { id: 'nato', name: 'NATO-Freigabe' },
-          { id: 'vs', name: 'Verschlusssachen-Ermächtigung' }
+          { id: 'ue3', name: 'Sicherheitsüberprüfung Ü3' }
         ]
       },
       {