diff --git a/backend/scripts/fix-question-bank.js b/backend/scripts/fix-question-bank.js
index 2afc193..6d8905b 100644
--- a/backend/scripts/fix-question-bank.js
+++ b/backend/scripts/fix-question-bank.js
@@ -26,6 +26,8 @@ const OUT = path.join(__dirname, `_qbank_proposals_${MODE}.json`);
 
 const db = new DatabaseSync(DB_PATH);
 try { db.exec('PRAGMA busy_timeout=8000'); } catch (e) {}
+// node:sqlite (DatabaseSync) НЕ имеет .transaction() — оборачиваем вручную.
+function runTx(fn) { db.exec('BEGIN'); try { fn(); db.exec('COMMIT'); } catch (e) { try { db.exec('ROLLBACK'); } catch (_) {} throw e; } }
 
 /* ── провайдер Kilo ── */
 function aset(k) { const r = db.prepare('SELECT value FROM app_settings WHERE key=?').get(k); return r && r.value != null ? r.value : null; }
@@ -67,11 +69,11 @@ function applyProposals() {
   let n = 0;
   if (MODE === 'broken') {
     const upd = db.prepare('UPDATE options SET is_correct = 1 WHERE id = ? AND question_id = ?');
-    db.transaction(() => { for (const p of props) { if (p.optionId) { upd.run(p.optionId, p.id); n++; } } })();
+    runTx(() => { for (const p of props) { if (p.optionId) { upd.run(p.optionId, p.id); n++; } } });
     console.log(`Применено: отмечено верных вариантов — ${n}`);
   } else {
     const upd = db.prepare('UPDATE questions SET topic_id = ? WHERE id = ? AND topic_id IS NULL');
-    db.transaction(() => { for (const p of props) { if (p.topicId) { upd.run(p.topicId, p.id); n++; } } })();
+    runTx(() => { for (const p of props) { if (p.topicId) { upd.run(p.topicId, p.id); n++; } } });
     console.log(`Применено: привязано тем — ${n}`);
   }
   process.exit(0);