diff --git a/apps/backend/src/db/migrations/079_drop_consignment_collect_links.sql b/apps/backend/src/db/migrations/079_drop_consignment_collect_links.sql
index 566a8a09..b40c8caf 100644
--- a/apps/backend/src/db/migrations/079_drop_consignment_collect_links.sql
+++ b/apps/backend/src/db/migrations/079_drop_consignment_collect_links.sql
@@ -96,7 +96,85 @@ CREATE UNIQUE INDEX IF NOT EXISTS uniq_consignment_inventories_bound_work_order
 
 -- 5) 寄卖发布押金的冻结核销行幂等键：同一提报单只能有一笔发布冻结，
 --    防止未来任何绕过"先读台账再冻结"约定的调用方重复扣款。
+--    生产库存在历史重复冻结（发布链路二次冻结缺陷的产物，如提报单 5 有两条冻结流水），
+--    直接建索引会 23505 失败：先与上面"重复绑定工单"同套路清理——保留每组最早一条冻结流水，
+--    多余流水退还多冻的钱（退额 = LEAST(多冻总额, 冻结池实有)，绝不无中生有）并写修正流水，
+--    仅改 payload 标记 superseded（移出押金口径与索引范围，原行保留可审计），再建索引。
+WITH ranked_freezes AS (
+  SELECT
+    id,
+    ROW_NUMBER() OVER (
+      PARTITION BY worker_id, payload_json ->> 'consignmentSubmissionId'
+      ORDER BY id ASC
+    ) AS rn
+  FROM worker_wallet_ledgers
+  WHERE ledger_type = 'deposit_freeze'
+    AND COALESCE(payload_json ->> 'kind', '') = 'consignment_publish'
+),
+superseded_freezes AS (
+  UPDATE worker_wallet_ledgers
+  SET
+    payload_json = payload_json || jsonb_build_object(
+      'kind', 'consignment_publish_superseded',
+      'supersededBy', '079_consignment_publish_freeze_dedup',
+      'supersededReason', '同一提报单重复冻结，多余一笔已退还并移出押金口径'
+    )
+  WHERE id IN (SELECT id FROM ranked_freezes WHERE rn > 1)
+  RETURNING id, worker_id, amount
+),
+-- 同一打手可能有多条多余流水：先按钱包聚合，避免 UPDATE ... FROM 只吃到其中一条
+superseded_totals AS (
+  SELECT
+    worker_id,
+    SUM(ABS(amount)) AS dup_frozen_fen,
+    jsonb_agg(id) AS source_ledger_ids
+  FROM superseded_freezes
+  GROUP BY worker_id
+),
+refund_plan AS (
+  SELECT
+    st.worker_id,
+    LEAST(st.dup_frozen_fen, COALESCE(w.frozen_deposit_amount, 0)) AS refund_fen,
+    COALESCE(w.available_amount, 0)
+      + LEAST(st.dup_frozen_fen, COALESCE(w.frozen_deposit_amount, 0)) AS available_after,
+    COALESCE(w.frozen_deposit_amount, 0)
+      - LEAST(st.dup_frozen_fen, COALESCE(w.frozen_deposit_amount, 0)) AS frozen_after,
+    st.source_ledger_ids
+  FROM superseded_totals st
+  LEFT JOIN worker_wallets w ON w.worker_id = st.worker_id
+),
+applied_refunds AS (
+  UPDATE worker_wallets w
+  SET
+    available_amount = rp.available_after,
+    frozen_deposit_amount = rp.frozen_after,
+    updated_at = NOW()
+  FROM refund_plan rp
+  WHERE w.worker_id = rp.worker_id
+  RETURNING w.worker_id
+)
+INSERT INTO worker_wallet_ledgers (
+  worker_id, ledger_type, amount, balance_after, frozen_after,
+  related_work_order_id, note, payload_json, created_at
+)
+SELECT
+  rp.worker_id,
+  'deposit_release',
+  rp.refund_fen,
+  rp.available_after,
+  rp.frozen_after,
+  NULL,
+  '重复冻结押金自动退还（079 迁移去重）',
+  jsonb_build_object(
+    'kind', 'consignment_publish_dedup_refund',
+    'sourceLedgerIds', rp.source_ledger_ids
+  ),
+  NOW()
+FROM refund_plan rp
+JOIN applied_refunds ar ON ar.worker_id = rp.worker_id
+WHERE rp.refund_fen > 0;
+
 CREATE UNIQUE INDEX IF NOT EXISTS uniq_worker_wallet_ledgers_consignment_publish_freeze
   ON worker_wallet_ledgers ((payload_json ->> 'consignmentSubmissionId'))
   WHERE ledger_type = 'deposit_freeze'
-    AND payload_json ->> 'kind' = 'consignment_publish';
+    AND COALESCE(payload_json ->> 'kind', '') = 'consignment_publish';
diff --git a/apps/backend/src/services/worker-platform/consignment-payout.test.ts b/apps/backend/src/services/worker-platform/consignment-payout.test.ts
index 8c443a80..43b1797a 100644
--- a/apps/backend/src/services/worker-platform/consignment-payout.test.ts
+++ b/apps/backend/src/services/worker-platform/consignment-payout.test.ts
@@ -128,3 +128,24 @@ test('拼单份额全部验收（母单转已验收）也必须补寄卖钩子
     '份额验收收官时必须结算供货货款（拼单母单无接单人，传 0 走供货渠道）',
   )
 })
+
+test('迁移 079：建冻结幂等索引前必须先去重历史重复冻结并退还多冻押金', async () => {
+  const migration = await readFile(
+    new URL('../../db/migrations/079_drop_consignment_collect_links.sql', import.meta.url),
+    'utf8',
+  )
+  // 生产曾因同提报单两条 consignment_publish 冻结流水建不起索引（23505），
+  // 修复是"先清脏数据再建约束"：去重退还必须在 CREATE UNIQUE INDEX 之前，顺序不能反
+  const dedupPos = migration.indexOf("'consignment_publish_superseded'")
+  const refundPos = migration.indexOf("'consignment_publish_dedup_refund'")
+  const indexPos = migration.indexOf(
+    'CREATE UNIQUE INDEX IF NOT EXISTS uniq_worker_wallet_ledgers_consignment_publish_freeze',
+  )
+  assert.ok(dedupPos > 0, '079 必须包含重复冻结去重（标记 superseded）')
+  assert.ok(refundPos > dedupPos, '去重后必须写退还修正流水')
+  assert.ok(indexPos > refundPos, '幂等索引必须建在去重退还之后，否则脏数据会 23505')
+  assert.ok(
+    migration.includes('LEAST(st.dup_frozen_fen, COALESCE(w.frozen_deposit_amount, 0))'),
+    '退还额必须封顶冻结池实有，绝不无中生有',
+  )
+})