diff --git a/deploy/sql/README.md b/deploy/sql/README.md
index e06944ed6..0946cd9df 100644
--- a/deploy/sql/README.md
+++ b/deploy/sql/README.md
@@ -3,7 +3,7 @@
 ## 唯一数据库初始化与发布入口
 
 - 国内区域固定入口：`头程数据库统一增量-MySQL8.sql`。文件名保留历史兼容，内容维护为当前完整数据库基线和存量环境兼容升级，不再按日期拆分发布脚本。
-- 海外区域固定增量入口：`海外区域统一增量-MySQL8.sql`；空库先执行 `lastleg-service/src/main/resources/db/lastleg.sql` 基线，再执行该入口。当前包含海外仓报价结构，后续海外主数据继续追加到同一入口，不按日期拆分。
+- 海外区域固定增量入口：`海外区域统一增量-MySQL8.sql`；空库先分别执行 `lastleg-service/src/main/resources/db/lastleg.sql` 与 `warehouse-overseas-service/src/main/resources/db/warehouse.sql` 基线，再执行该入口。固定入口同时升级 `baiyue_lastleg` 与 `baiyue_lastlag_warehouse`，当前包含海外主数据、业务、入仓库存与海外仓托盘兼容结构，后续继续追加到同一入口，不按日期拆分。
 - 国内、海外 Compose 部署默认设置 `SPRING_SQL_INIT_MODE=never`，执行任一 SQL 均需用户单独授权。
 - 该脚本汇总一期、二期及已实现三期出仓能力的数据库基线、存量升级、IAM 权限资源和最终结构校验，适用于 MySQL 8.0。
 - 正式上线前的数据库变更直接维护该文件中的当前基线、存量兼容处理和最终校验，不再创建按日期拆分的发布 SQL；正式上线后的迁移策略在生产发布规范中另行冻结。
diff --git a/deploy/sql/海外区域统一增量-MySQL8.sql b/deploy/sql/海外区域统一增量-MySQL8.sql
index ac65f97a9..508e02ba8 100644
--- a/deploy/sql/海外区域统一增量-MySQL8.sql
+++ b/deploy/sql/海外区域统一增量-MySQL8.sql
@@ -404,4 +404,31 @@ SET @ddl = (SELECT IF(EXISTS (SELECT 1 FROM information_schema.statistics WHERE
   'SELECT 1', 'ALTER TABLE ll_inbound_stock_receipt ADD UNIQUE KEY uk_ll_stock_receipt_task_allocation_sku (customer_id,task_id,allocation_id,sku_code)'));
 PREPARE phase4_inventory_stmt FROM @ddl; EXECUTE phase4_inventory_stmt; DEALLOCATE PREPARE phase4_inventory_stmt;
 
-SELECT 'PASS' AS migration_status, '海外仓报价、月度汇率、车辆主数据、海外业务与入仓单目的仓库存结构已就绪' AS message;
+-- Warehouse Overseas 与 Lastleg 使用同一海外区域发布入口但保持独立数据库。
+-- 公共托盘详情实体读取 fba_warehouse_code；旧库缺列时创建可成功但详情会 S0500。
+USE baiyue_lastlag_warehouse;
+SET @ddl = (SELECT IF(EXISTS (SELECT 1 FROM information_schema.columns
+  WHERE table_schema=DATABASE() AND table_name='wh_pallet' AND column_name='fba_warehouse_code'),
+  'SELECT 1',
+  'ALTER TABLE wh_pallet ADD COLUMN fba_warehouse_code VARCHAR(128) NULL COMMENT ''所属FBA仓编码'' AFTER remark'));
+PREPARE phase4_warehouse_pallet_stmt FROM @ddl;
+EXECUTE phase4_warehouse_pallet_stmt;
+DEALLOCATE PREPARE phase4_warehouse_pallet_stmt;
+
+SET @warehouse_pallet_fba_ready = (SELECT COUNT(*) FROM information_schema.columns
+  WHERE table_schema='baiyue_lastlag_warehouse' AND table_name='wh_pallet'
+    AND column_name='fba_warehouse_code' AND column_type='varchar(128)');
+DROP PROCEDURE IF EXISTS assert_phase4_warehouse_pallet_ready;
+DELIMITER $$
+CREATE PROCEDURE assert_phase4_warehouse_pallet_ready()
+BEGIN
+  IF @warehouse_pallet_fba_ready <> 1 THEN
+    SIGNAL SQLSTATE '45000' SET MESSAGE_TEXT='wh_pallet.fba_warehouse_code migration is incomplete';
+  END IF;
+END$$
+DELIMITER ;
+CALL assert_phase4_warehouse_pallet_ready();
+DROP PROCEDURE assert_phase4_warehouse_pallet_ready;
+
+USE baiyue_lastleg;
+SELECT 'PASS' AS migration_status, '海外仓报价、月度汇率、车辆、海外业务、入仓库存与海外仓托盘结构已就绪' AS message;
diff --git a/warehouse-overseas-service/src/test/java/com/baiyue/warehouse/schema/WarehouseUnifiedIncrementalContractTest.java b/warehouse-overseas-service/src/test/java/com/baiyue/warehouse/schema/WarehouseUnifiedIncrementalContractTest.java
new file mode 100644
index 000000000..0492c6281
--- /dev/null
+++ b/warehouse-overseas-service/src/test/java/com/baiyue/warehouse/schema/WarehouseUnifiedIncrementalContractTest.java
@@ -0,0 +1,24 @@
+package com.baiyue.warehouse.schema;
+
+import org.junit.jupiter.api.Test;
+
+import java.nio.charset.StandardCharsets;
+import java.nio.file.Files;
+import java.nio.file.Path;
+
+import static org.junit.jupiter.api.Assertions.assertTrue;
+
+class WarehouseUnifiedIncrementalContractTest {
+
+    @Test
+    void overseasUnifiedEntryUpgradesAndValidatesPalletFbaWarehouseCode() throws Exception {
+        String sql = Files.readString(
+            Path.of("..", "deploy", "sql", "海外区域统一增量-MySQL8.sql"), StandardCharsets.UTF_8);
+
+        assertTrue(sql.contains("USE baiyue_lastlag_warehouse"));
+        assertTrue(sql.contains("ALTER TABLE wh_pallet ADD COLUMN fba_warehouse_code VARCHAR(128) NULL"));
+        assertTrue(sql.contains("@warehouse_pallet_fba_ready"));
+        assertTrue(sql.contains("wh_pallet.fba_warehouse_code migration is incomplete"));
+        assertTrue(sql.contains("USE baiyue_lastleg"));
+    }
+}