diff --git a/blueprints/community/classifieds/routes.py b/blueprints/community/classifieds/routes.py
index bcd77fd..948515b 100644
--- a/blueprints/community/classifieds/routes.py
+++ b/blueprints/community/classifieds/routes.py
@@ -409,6 +409,14 @@ def delete(classified_id):
         if not classified:
             return jsonify({'success': False, 'error': 'Ogłoszenie nie istnieje'}), 404
 
+        # SQLAlchemy ORM doesn't honor DB-level CASCADE — it tries to UPDATE
+        # FK to NULL on related rows first, which fails on NOT NULL columns.
+        # Same pattern as forum reply delete fix. Wipe related rows first.
+        db.query(ClassifiedRead).filter(ClassifiedRead.classified_id == classified.id).delete(synchronize_session=False)
+        db.query(ClassifiedInterest).filter(ClassifiedInterest.classified_id == classified.id).delete(synchronize_session=False)
+        db.query(ClassifiedQuestion).filter(ClassifiedQuestion.classified_id == classified.id).delete(synchronize_session=False)
+        db.query(ClassifiedAttachment).filter(ClassifiedAttachment.classified_id == classified.id).delete(synchronize_session=False)
+
         db.delete(classified)
         db.commit()