diff --git a/tradein-mvp/backend/scripts/backfill_listing_sources.py b/tradein-mvp/backend/scripts/backfill_listing_sources.py
index d757d35d..7f2477ff 100644
--- a/tradein-mvp/backend/scripts/backfill_listing_sources.py
+++ b/tradein-mvp/backend/scripts/backfill_listing_sources.py
@@ -118,7 +118,6 @@ class ListingRow:
     year_built: int | None
     cadastral_number: str | None
     building_cadastral_number: str | None
-    kadastr_num: str | None
     house_source: str | None
     house_ext_id: str | None
     house_url: str | None
@@ -152,7 +151,7 @@ class Stats:
 _LISTING_COLUMNS = (
     "id, source, source_id, source_url, dedup_hash, "
     "address, lat, lon, rooms, area_m2, floor, price_rub, year_built, "
-    "cadastral_number, building_cadastral_number, kadastr_num, "
+    "cadastral_number, building_cadastral_number, "
     "house_source, house_ext_id, house_url, house_id_fk"
 )
 
@@ -217,7 +216,6 @@ def _fetch_batch(
             year_built=r["year_built"],
             cadastral_number=r["cadastral_number"],
             building_cadastral_number=r["building_cadastral_number"],
-            kadastr_num=r["kadastr_num"],
             house_source=r["house_source"],
             house_ext_id=r["house_ext_id"],
             house_url=r["house_url"],
@@ -294,7 +292,7 @@ def _link_listing_to_house(
                         lon=row.lon,
                         year_built=row.year_built,
                         building_cadastral_number=row.building_cadastral_number,
-                        cadastral_number=row.cadastral_number or row.kadastr_num,
+                        cadastral_number=row.cadastral_number,
                         source_url=row.house_url or row.source_url,
                     )
                     house_resolved = house_id is not None
diff --git a/tradein-mvp/backend/tests/scripts/test_backfill_listing_sources.py b/tradein-mvp/backend/tests/scripts/test_backfill_listing_sources.py
index 544af13c..4dcb92de 100644
--- a/tradein-mvp/backend/tests/scripts/test_backfill_listing_sources.py
+++ b/tradein-mvp/backend/tests/scripts/test_backfill_listing_sources.py
@@ -66,7 +66,6 @@ def _row(**overrides) -> ListingRow:
         "year_built": 2010,
         "cadastral_number": None,
         "building_cadastral_number": None,
-        "kadastr_num": None,
         "house_source": None,
         "house_ext_id": None,
         "house_url": None,
@@ -147,7 +146,6 @@ def _row_dict(row: ListingRow) -> dict:
         "year_built": row.year_built,
         "cadastral_number": row.cadastral_number,
         "building_cadastral_number": row.building_cadastral_number,
-        "kadastr_num": row.kadastr_num,
         "house_source": row.house_source,
         "house_ext_id": row.house_ext_id,
         "house_url": row.house_url,
@@ -211,6 +209,16 @@ def test_select_sql_filters_by_source_when_provided():
     assert "source = :source" in sql
 
 
+def test_select_sql_has_no_dropped_kadastr_num_column():
+    """`listings.kadastr_num` was dropped in 094_cadastral_unify.sql — the SELECT
+    must not reference it or psycopg raises UndefinedColumn on every run."""
+    sql = _build_select_sql(source=None, batch_size=500)
+    assert "kadastr_num" not in sql
+    # The canonical apartment-level cadastral columns remain.
+    assert "cadastral_number" in sql
+    assert "building_cadastral_number" in sql
+
+
 # ---------------------------------------------------------------------------
 # Happy path — one listing → 1 link + 1 house resolution
 # ---------------------------------------------------------------------------