diff --git a/backend/database.py b/backend/database.py
index 5b5b0c8..1ddfc8e 100644
--- a/backend/database.py
+++ b/backend/database.py
@@ -1633,6 +1633,38 @@ def _migrate(conn_factory):
         # Partner-Profile (öffentlicher Showcase auf /#partner)
         # approved: 0=Entwurf/in Prüfung, 1=freigegeben, -1=abgelehnt
         try:
+            # Alt-Schema aus der verlorenen v1102-Session (photos statt photos_json,
+            # id-Autoincrement-PK) kann auf Staging/Prod noch existieren → umbauen.
+            existing_cols = [r[1] for r in conn.execute(
+                "PRAGMA table_info(partner_profiles)"
+            ).fetchall()]
+            if existing_cols and "photos_json" not in existing_cols:
+                conn.executescript("""
+                    ALTER TABLE partner_profiles RENAME TO partner_profiles_old;
+                    CREATE TABLE partner_profiles (
+                        user_id      INTEGER PRIMARY KEY REFERENCES users(id) ON DELETE CASCADE,
+                        display_name TEXT,
+                        tagline      TEXT,
+                        bio          TEXT,
+                        website      TEXT,
+                        instagram    TEXT,
+                        logo_url     TEXT,
+                        photos_json  TEXT NOT NULL DEFAULT '[]',
+                        approved     INTEGER NOT NULL DEFAULT 0,
+                        submitted_at TEXT,
+                        updated_at   TEXT,
+                        created_at   TEXT NOT NULL DEFAULT (datetime('now'))
+                    );
+                    INSERT INTO partner_profiles
+                        (user_id, display_name, tagline, bio, website, instagram,
+                         logo_url, photos_json, approved, submitted_at, updated_at, created_at)
+                    SELECT user_id, display_name, tagline, bio, website, instagram,
+                           logo_url, COALESCE(photos, '[]'), COALESCE(approved, 0),
+                           submitted_at, NULL, datetime('now')
+                    FROM partner_profiles_old;
+                    DROP TABLE partner_profiles_old;
+                """)
+                logger.info("Migration: partner_profiles Alt-Schema → neues Schema umgebaut.")
             conn.executescript("""
                 CREATE TABLE IF NOT EXISTS partner_profiles (
                     user_id      INTEGER PRIMARY KEY REFERENCES users(id) ON DELETE CASCADE,