diff --git a/deploy/sql/头程数据库统一增量-MySQL8.sql b/deploy/sql/头程数据库统一增量-MySQL8.sql
index e7f6acec2..64c6fabe7 100644
--- a/deploy/sql/头程数据库统一增量-MySQL8.sql
+++ b/deploy/sql/头程数据库统一增量-MySQL8.sql
@@ -6567,14 +6567,20 @@ DROP PROCEDURE IF EXISTS unified_publish_assert_fee_item_preflight;
 DELIMITER $$
 CREATE PROCEDURE unified_publish_assert_fee_item_preflight()
 BEGIN
-  IF (SELECT COUNT(*) FROM tmp_fee_item_seed) <> 110
-     OR (SELECT COUNT(*) FROM tmp_fee_item_seed WHERE trade_scope = 'DOMESTIC') <> 84
-     OR (SELECT COUNT(*) FROM tmp_fee_item_seed WHERE trade_scope = 'INTERNATIONAL') <> 26 THEN
-    SIGNAL SQLSTATE '45000' SET MESSAGE_TEXT = '二期费用项目迁移失败：Excel种子数量或国内国际范围不正确';
+  IF (SELECT COUNT(*) FROM tmp_fee_item_seed) <> 110 THEN
+    SIGNAL SQLSTATE '45000' SET MESSAGE_TEXT = '二期费用项目迁移失败：Excel种子总数不正确';
   END IF;
-  IF EXISTS (SELECT fee_code FROM tmp_fee_item_seed GROUP BY fee_code HAVING COUNT(*) > 1)
-     OR EXISTS (SELECT trade_scope, fee_type_name FROM tmp_fee_item_seed GROUP BY trade_scope, fee_type_name HAVING COUNT(*) > 1) THEN
-    SIGNAL SQLSTATE '45000' SET MESSAGE_TEXT = '二期费用项目迁移失败：Excel种子编码或语义键重复';
+  IF (SELECT COUNT(*) FROM tmp_fee_item_seed WHERE trade_scope = 'DOMESTIC') <> 84 THEN
+    SIGNAL SQLSTATE '45000' SET MESSAGE_TEXT = '二期费用项目迁移失败：Excel国内种子数量不正确';
+  END IF;
+  IF (SELECT COUNT(*) FROM tmp_fee_item_seed WHERE trade_scope = 'INTERNATIONAL') <> 26 THEN
+    SIGNAL SQLSTATE '45000' SET MESSAGE_TEXT = '二期费用项目迁移失败：Excel国际种子数量不正确';
+  END IF;
+  IF EXISTS (SELECT fee_code FROM tmp_fee_item_seed GROUP BY fee_code HAVING COUNT(*) > 1) THEN
+    SIGNAL SQLSTATE '45000' SET MESSAGE_TEXT = '二期费用项目迁移失败：Excel种子编码重复';
+  END IF;
+  IF EXISTS (SELECT trade_scope, fee_type_name FROM tmp_fee_item_seed GROUP BY trade_scope, fee_type_name HAVING COUNT(*) > 1) THEN
+    SIGNAL SQLSTATE '45000' SET MESSAGE_TEXT = '二期费用项目迁移失败：Excel种子语义键重复';
   END IF;
   IF EXISTS (
     SELECT f.id
@@ -6648,18 +6654,20 @@ BEGIN
   IF EXISTS (
     SELECT f.id
       FROM fl_fee_item f
-      LEFT JOIN tmp_fee_item_seed by_code ON by_code.fee_code = NULLIF(TRIM(f.fee_code), '')
-      LEFT JOIN tmp_fee_item_seed by_semantic ON by_semantic.trade_scope = f.trade_scope
-        AND by_semantic.fee_type_name = f.fee_type_name
-     WHERE f.tenant_id > 0 AND by_code.seed_no IS NULL AND by_semantic.seed_no IS NULL
+      LEFT JOIN tmp_fee_item_seed matched_seed
+        ON matched_seed.fee_code = NULLIF(TRIM(f.fee_code), '')
+        OR (matched_seed.trade_scope = f.trade_scope
+          AND matched_seed.fee_type_name = f.fee_type_name)
+     WHERE f.tenant_id > 0 AND matched_seed.seed_no IS NULL
   ) THEN
     SELECT 'UNMAPPED_CUSTOMER_ITEM' AS conflict_type, f.id, f.tenant_id, f.fee_code,
            f.trade_scope, f.fee_type_name
       FROM fl_fee_item f
-      LEFT JOIN tmp_fee_item_seed by_code ON by_code.fee_code = NULLIF(TRIM(f.fee_code), '')
-      LEFT JOIN tmp_fee_item_seed by_semantic ON by_semantic.trade_scope = f.trade_scope
-        AND by_semantic.fee_type_name = f.fee_type_name
-     WHERE f.tenant_id > 0 AND by_code.seed_no IS NULL AND by_semantic.seed_no IS NULL;
+       LEFT JOIN tmp_fee_item_seed matched_seed
+         ON matched_seed.fee_code = NULLIF(TRIM(f.fee_code), '')
+         OR (matched_seed.trade_scope = f.trade_scope
+           AND matched_seed.fee_type_name = f.fee_type_name)
+      WHERE f.tenant_id > 0 AND matched_seed.seed_no IS NULL;
     SIGNAL SQLSTATE '45000' SET MESSAGE_TEXT = '二期费用项目迁移失败：存在无法匹配公共种子的客户费用项目';
   END IF;
   IF EXISTS (
diff --git a/firstleg/src/main/resources/db/phase2-published-freight-detail-migration.sql b/firstleg/src/main/resources/db/phase2-published-freight-detail-migration.sql
index b47ce73c4..4bb4cdd04 100644
--- a/firstleg/src/main/resources/db/phase2-published-freight-detail-migration.sql
+++ b/firstleg/src/main/resources/db/phase2-published-freight-detail-migration.sql
@@ -170,14 +170,20 @@ DROP PROCEDURE IF EXISTS phase2_publish_assert_fee_item_preflight;
 DELIMITER $$
 CREATE PROCEDURE phase2_publish_assert_fee_item_preflight()
 BEGIN
-  IF (SELECT COUNT(*) FROM tmp_fee_item_seed) <> 110
-     OR (SELECT COUNT(*) FROM tmp_fee_item_seed WHERE trade_scope = 'DOMESTIC') <> 84
-     OR (SELECT COUNT(*) FROM tmp_fee_item_seed WHERE trade_scope = 'INTERNATIONAL') <> 26 THEN
-    SIGNAL SQLSTATE '45000' SET MESSAGE_TEXT = '二期费用项目迁移失败：Excel种子数量或国内国际范围不正确';
+  IF (SELECT COUNT(*) FROM tmp_fee_item_seed) <> 110 THEN
+    SIGNAL SQLSTATE '45000' SET MESSAGE_TEXT = '二期费用项目迁移失败：Excel种子总数不正确';
   END IF;
-  IF EXISTS (SELECT fee_code FROM tmp_fee_item_seed GROUP BY fee_code HAVING COUNT(*) > 1)
-     OR EXISTS (SELECT trade_scope, fee_type_name FROM tmp_fee_item_seed GROUP BY trade_scope, fee_type_name HAVING COUNT(*) > 1) THEN
-    SIGNAL SQLSTATE '45000' SET MESSAGE_TEXT = '二期费用项目迁移失败：Excel种子编码或语义键重复';
+  IF (SELECT COUNT(*) FROM tmp_fee_item_seed WHERE trade_scope = 'DOMESTIC') <> 84 THEN
+    SIGNAL SQLSTATE '45000' SET MESSAGE_TEXT = '二期费用项目迁移失败：Excel国内种子数量不正确';
+  END IF;
+  IF (SELECT COUNT(*) FROM tmp_fee_item_seed WHERE trade_scope = 'INTERNATIONAL') <> 26 THEN
+    SIGNAL SQLSTATE '45000' SET MESSAGE_TEXT = '二期费用项目迁移失败：Excel国际种子数量不正确';
+  END IF;
+  IF EXISTS (SELECT fee_code FROM tmp_fee_item_seed GROUP BY fee_code HAVING COUNT(*) > 1) THEN
+    SIGNAL SQLSTATE '45000' SET MESSAGE_TEXT = '二期费用项目迁移失败：Excel种子编码重复';
+  END IF;
+  IF EXISTS (SELECT trade_scope, fee_type_name FROM tmp_fee_item_seed GROUP BY trade_scope, fee_type_name HAVING COUNT(*) > 1) THEN
+    SIGNAL SQLSTATE '45000' SET MESSAGE_TEXT = '二期费用项目迁移失败：Excel种子语义键重复';
   END IF;
   IF EXISTS (
     SELECT f.id
@@ -251,18 +257,20 @@ BEGIN
   IF EXISTS (
     SELECT f.id
       FROM fl_fee_item f
-      LEFT JOIN tmp_fee_item_seed by_code ON by_code.fee_code = NULLIF(TRIM(f.fee_code), '')
-      LEFT JOIN tmp_fee_item_seed by_semantic ON by_semantic.trade_scope = f.trade_scope
-        AND by_semantic.fee_type_name = f.fee_type_name
-     WHERE f.tenant_id > 0 AND by_code.seed_no IS NULL AND by_semantic.seed_no IS NULL
+      LEFT JOIN tmp_fee_item_seed matched_seed
+        ON matched_seed.fee_code = NULLIF(TRIM(f.fee_code), '')
+        OR (matched_seed.trade_scope = f.trade_scope
+          AND matched_seed.fee_type_name = f.fee_type_name)
+     WHERE f.tenant_id > 0 AND matched_seed.seed_no IS NULL
   ) THEN
     SELECT 'UNMAPPED_CUSTOMER_ITEM' AS conflict_type, f.id, f.tenant_id, f.fee_code,
            f.trade_scope, f.fee_type_name
       FROM fl_fee_item f
-      LEFT JOIN tmp_fee_item_seed by_code ON by_code.fee_code = NULLIF(TRIM(f.fee_code), '')
-      LEFT JOIN tmp_fee_item_seed by_semantic ON by_semantic.trade_scope = f.trade_scope
-        AND by_semantic.fee_type_name = f.fee_type_name
-     WHERE f.tenant_id > 0 AND by_code.seed_no IS NULL AND by_semantic.seed_no IS NULL;
+       LEFT JOIN tmp_fee_item_seed matched_seed
+         ON matched_seed.fee_code = NULLIF(TRIM(f.fee_code), '')
+         OR (matched_seed.trade_scope = f.trade_scope
+           AND matched_seed.fee_type_name = f.fee_type_name)
+      WHERE f.tenant_id > 0 AND matched_seed.seed_no IS NULL;
     SIGNAL SQLSTATE '45000' SET MESSAGE_TEXT = '二期费用项目迁移失败：存在无法匹配公共种子的客户费用项目';
   END IF;
   IF EXISTS (
diff --git a/firstleg/src/test/java/com/baiyue/firstleg/repository/FeeItemMigrationSqlContractTest.java b/firstleg/src/test/java/com/baiyue/firstleg/repository/FeeItemMigrationSqlContractTest.java
new file mode 100644
index 000000000..05c24592f
--- /dev/null
+++ b/firstleg/src/test/java/com/baiyue/firstleg/repository/FeeItemMigrationSqlContractTest.java
@@ -0,0 +1,36 @@
+package com.baiyue.firstleg.repository;
+
+import org.junit.jupiter.api.Test;
+
+import java.nio.charset.StandardCharsets;
+import java.nio.file.Files;
+import java.nio.file.Path;
+
+import static org.assertj.core.api.Assertions.assertThat;
+
+class FeeItemMigrationSqlContractTest {
+    @Test
+    void temporarySeedTableIsNotReopenedWithinOneMysqlStatement() throws Exception {
+        assertMysqlCompatible(resolve("deploy/sql/头程数据库统一增量-MySQL8.sql"));
+        assertMysqlCompatible(resolve(
+            "firstleg/src/main/resources/db/phase2-published-freight-detail-migration.sql"));
+    }
+
+    private static void assertMysqlCompatible(Path path) throws Exception {
+        String sql = Files.readString(path, StandardCharsets.UTF_8);
+        assertThat(sql)
+            .contains("LEFT JOIN tmp_fee_item_seed matched_seed")
+            .contains("matched_seed.fee_code = NULLIF(TRIM(f.fee_code), '')")
+            .contains("matched_seed.trade_scope = f.trade_scope")
+            .doesNotContain("LEFT JOIN tmp_fee_item_seed by_code")
+            .doesNotContain("LEFT JOIN tmp_fee_item_seed by_semantic")
+            .doesNotContain("OR (SELECT COUNT(*) FROM tmp_fee_item_seed")
+            .doesNotContain("OR EXISTS (SELECT trade_scope, fee_type_name FROM tmp_fee_item_seed");
+    }
+
+    private static Path resolve(String value) {
+        Path direct = Path.of(value);
+        if (Files.exists(direct)) return direct;
+        return Path.of("..", value).normalize();
+    }
+}