diff --git a/scripts/import_markdown.py b/scripts/import_markdown.py
index 8bada43..8f3c69c 100644
--- a/scripts/import_markdown.py
+++ b/scripts/import_markdown.py
@@ -2,18 +2,13 @@
 # -*- coding: utf-8 -*-
 """
 Script: scripts/import_markdown.py — Markdown → Qdrant (Notes, Chunks, Edges)
-Version: 3.8.0
+Version: 3.8.1
 Datum: 2025-11-08
 
-Erweiterung (WP-03 Type-Registry)
----------------------------------
-- Lädt optional config/types.yaml.
-- Unbekannte/fehlende Typen → Fallback "concept" (Warnung, kein Abbruch).
-- chunk_profile des Typs wird an make_chunk_payloads(...) übergeben (optional).
-- retriever_weight wird – falls vorhanden – als Feld im Note-Payload gespeichert.
-- edge_defaults["references"] aktiviert *additiv* Note-Scope-References/Backlinks.
-
-Abwärtskompatibel: Ohne Registry/Typ bleibt das Verhalten identisch zum Stand 20251105.
+Änderung in 3.8.1
+------------------
+- Abwärtskompatibler Import von `ensure_payload_indexes`:
+  Fallback auf `ensure_payload_indices` oder No-Op, falls beides fehlt.
 """
 from __future__ import annotations
 
@@ -38,12 +33,25 @@ try:
     from app.core.derive_edges import build_edges_for_note
 except Exception:  # pragma: no cover
     from app.core.edges import build_edges_for_note  # type: ignore
+
+# Qdrant-Basics
 from app.core.qdrant import (
     QdrantConfig,
     get_client,
     ensure_collections,
-    ensure_payload_indexes,
 )
+
+# Abwärtskompatibler Import für Payload-Index-Erzeugung
+try:
+    from app.core.qdrant import ensure_payload_indexes as _ensure_payload_indexes
+except Exception:
+    try:
+        from app.core.qdrant import ensure_payload_indices as _ensure_payload_indexes  # älterer Funktionsname
+    except Exception:
+        def _ensure_payload_indexes(*_args, **_kwargs):
+            # No-Op: ältere Releases ohne dedizierte Index-Funktion
+            return None
+
 from app.core.qdrant_points import (
     points_for_chunks,
     points_for_note,
@@ -214,7 +222,8 @@ def main() -> None:
         cfg.prefix = args.prefix.strip()
     client = get_client(cfg)
     ensure_collections(client, cfg.prefix, cfg.dim)
-    ensure_payload_indexes(client, cfg.prefix)
+    # abwärtskompatible Index-Erstellung
+    _ensure_payload_indexes(client, cfg.prefix)
 
     # Type-Registry laden (optional)
     reg = None
@@ -414,7 +423,7 @@ def main() -> None:
             merged_hashes = {}
             merged_hashes.update(old_hashes)
             merged_hashes.update(note_pl.get("hashes") or {})
-            if old_payload:
+            if has_old and old_payload:
                 note_pl["hash_fulltext"] = old_payload.get("hash_fulltext", note_pl.get("hash_fulltext"))
                 note_pl["hash_signature"] = old_payload.get("hash_signature", note_pl.get("hash_signature"))
             note_pl["hashes"] = merged_hashes