diff --git a/docs/README.md b/docs/README.md
index 9db9aa7..a637716 100644
--- a/docs/README.md
+++ b/docs/README.md
@@ -21,6 +21,7 @@ Wir entwickeln auf Python 3.14. Python 3.12+ funktioniert, ältere haben zuminde
 
 - Datenbank (SQLite) anlegen: `python3 manage.py makemigrations quellen; python3 manage.py migrate`
 - Admin anlegen: `python3 manage.py createsuperuser`
+- ggf. Liederquelle-Daten laden: `python3 manage.py loaddata ../fixtures/fixture.yaml`
 - Server starten: `python3 manage.py runserver`
 - Öffne http://localhost:8080/admin im Browser
 
diff --git a/liederquelle/quellen/management/commands/import_authors.py b/liederquelle/quellen/management/commands/import_authors.py
index 9009a03..4bdce3e 100644
--- a/liederquelle/quellen/management/commands/import_authors.py
+++ b/liederquelle/quellen/management/commands/import_authors.py
@@ -2,9 +2,7 @@
 Import für `authors.yml` aus `lilypond-song-includes`
 
 TODO:
-- inherits (sollte 2. Identität für eine Person anlegen)
 - details_secret
-- aktualisieren statt neu anlegen
 - Import direkt aus dem git
 - Keine Lösung für trail_name_native_spelling (sehr selten)
 - Tags
@@ -59,35 +57,49 @@ class Command(BaseCommand):
             author.update(data[key])
             if not author['name'] and author['trail_name']:
                 author['name'] = author['trail_name']
-            p = Person(
-                name = author['name'],
-                full_name = author['full_name'],
-                name_native = author['name_native_spelling'],
-                birth_name = author['birth_name'],
-                details_secret = False,
-                birth_year = author['birth_year'],
-                death_year = author['death_year'],
-                remarks = author['comment'],
-            )
-            p.save()
-            pi = Identity(
+            if 'inherits' in author:
+                self.stdout.write('\terbt von %s' % author['inherits'])
+                oi = Identity.objects.get(author_id = author['inherits'])
+                orig = data[author['inherits']]
+                p = oi.person
+                for akey in self.default_author.keys():
+                    if not author[akey] and akey in orig:
+                        author[akey] = orig[akey]
+            else:
+                try:
+                    p, created = Person.objects.update_or_create(
+                        name = author['name'],
+                        full_name = author['full_name'],
+                        name_native = author['name_native_spelling'],
+                        birth_name = author['birth_name'],
+                        details_secret = False,
+                        birth_year = author['birth_year'],
+                        death_year = author['death_year'],
+                        remarks = author['comment'],
+                    )
+                except Person.MultipleObjectsReturned as e:
+                    ps = Person.objects.filter(name = author['name'])
+                    self.stdout.write("\tist doppelt:")
+                    self.stdout.write(str(author))
+                    self.stdout.write(str(ps))
+                    p = ps[0]
+                    #raise e
+            pi, created = Identity.objects.update_or_create(
                 person = p,
                 author_id = key,
                 alias = author['trail_name'],
                 organization = author['organization'],
             )
-            pi.save()
             for service in 'gnd isni orcid viaf wiki discogs lied brainz'.split():
                 dbkey = service
                 if service=='wiki':
                     dbkey = 'wikidata'
                 if dbkey in author and author[dbkey]:
-                    pai = AuthorID(
+                    pai, created = AuthorID.objects.update_or_create(
                         person = p,
                         key = AuthorID.IDs.__dict__[service.upper()],
                         value = author[dbkey],
                     )
-                    pai.save()
 
 
         # for poll_id in options["poll_ids"]: