diff --git a/MASTER_INDEX.md b/MASTER_INDEX.md
index 01b366843..15aab7560 100644
--- a/MASTER_INDEX.md
+++ b/MASTER_INDEX.md
@@ -17,6 +17,7 @@
 | **Infrastruktur** | infrastructure/STATE.md | Alle Server + Container |
 | **RAGFlow** | infrastructure/RAGFLOW.md | PDF-RAG (~20k Docs, Muldenstein) |
 | **OpenMemory** | infrastructure/OPENMEMORY.md | mem0 Memory-Store + MCP (CT122), inkl. 2026-05-31 Hotfix |
+| **Troubleshooting** | infrastructure/TROUBLESHOOTING.md | Runbooks: pve-mu-2 Tailscale-Key, Systemvorhersage-Fehlalarme |
 | **Homelab AI Bot** | — | Hausmeister Telegram Bot (CT 116) |
 | **KI-Video Pipeline** | ki-video/PLAN.md | Lokale Videoproduktion: Qwen + FLUX + XTTS + SadTalker (ki-tower) |
 | **Webcam Kambodscha** | — | Dahua 4K → cam.arakavanews.com (CT 600 auf pve-ka-3) |